Journal name: Analytica chimica acta / Subject term: gas chromatography-mass spectrometry / Text availability: Citation in PubAg

1. Critical review of analytical methods for the determination of flame retardants in human matrices

Author:: Parvaneh Hajeb; Argelia Castaño; Enrique Cequier; Adrian Covaci; Marta Esteban López; Ana Gonzalez Antuña; Line Småstuen Haug; Luis Alberto Henríquez-Hernández; Lisa Melymuk; Octavio Pérez Luzardo; Cathrine Thomsen; Katrin Vorkamp
Source:: Analytica chimica acta 2022 v.1193 pp. 338828
ISSN:: 0003-2670
Subject:: biomarkers; biphenyl; chemical analysis; derivatization; environmental monitoring; gas chromatography-mass spectrometry; hexabromocyclododecane; humans; lipophilicity; liquid-liquid extraction; metabolites; quality control; risk; solid phase extraction
Abstract:: ... Human biomonitoring is a powerful approach in assessing exposure to environmental pollutants. Flame retardants (FRs) are of particular concern due to their wide distribution in the environment and adverse health effects. This article reviews studies published in 2009–2020 on the chemical analysis of FRs in a variety of human samples and discusses the characteristics of the analytical methods appli ...
DOI:: 10.1016/j.aca.2021.338828
: https://doi.org/10.1016/j.aca.2021.338828

2. The history of electron ionization in LC-MS, from the early days to modern technologies: A review

Author:: Giorgio Famiglini; Pierangela Palma; Veronica Termopoli; Achille Cappiello
Source:: Analytica chimica acta 2021 v.1167 pp. 338350
ISSN:: 0003-2670
Subject:: gas chromatography-mass spectrometry; ionization; liquid chromatography
Abstract:: ... This review article traces the history of the use of liquid chromatography coupled with mass spectrometry (LC-MS) using electron ionization (EI) from the first attempts up to the present day. At the time of the first efforts to couple LC to MS, 70 eV EI was the most common ionization technique, typically used in gas chromatography-mass spectrometry (GC-MS) and providing highly reproducible mass sp ...
DOI:: 10.1016/j.aca.2021.338350
: https://doi.org/10.1016/j.aca.2021.338350

3. A comparison of fast and reactive pyrolysis with insitu derivatisation of fructose, inulin and Jerusalem artichoke (Helianthus tuberosus)

Author:: Marco Mattonai; Erika Ribechini
Source:: Analytica chimica acta 2018 v.1017 pp. 66-74
ISSN:: 0003-2670
Subject:: Helianthus tuberosus; Jerusalem artichokes; analytical chemistry; bioactive properties; biomass; derivatization; fructose; gas chromatography-mass spectrometry; glass; inulin; pyrolysis; temperature; thermal stability; tubers
Abstract:: ... Reactive pyrolysis is a technique that provides mechanistic information by performing pyrolysis of the substrate in a sealed glass capsule at elevated temperature and pressure for relatively long time. This technique has already shown great potential for the analysis of biomass, favouring the formation of only the most thermostable compounds. In this work, both fast and reactive pyrolysis with on- ...
DOI:: 10.1016/j.aca.2018.02.019
: https://doi.org/10.1016/j.aca.2018.02.019

4. Determination of volatile fatty acids in digestate by solvent extraction with dimethyl carbonate and gas chromatography-mass spectrometry

Author:: Michele Ghidotti; Daniele Fabbri; Cristian Torri; Sergio Piccinini
Source:: Analytica chimica acta 2018 pp. -
ISSN:: 0003-2670
Subject:: acidification; anaerobic digesters; anaerobic digestion; analytical chemistry; aromatic acids; biogas; centrifugation; feedstocks; gas chromatography-mass spectrometry; genetic markers; probability; process monitoring; propionic acid; solvents; volatile fatty acids
Abstract:: ... Volatile fatty acids (VFAs) are among the most important parameters in process monitoring of anaerobic digestion plants for biogas production. The concentration of single VFA species is typically determined by direct injection of the acidified aqueous phase of digestate samples into GC-FID. Analysis of dimethyl carbonate extracts was investigated as an alternative method consisting of a simple and ...
DOI:: 10.1016/j.aca.2018.06.082
: https://doi.org/10.1016/j.aca.2018.06.082

5. A multi-analytical approach to better assess the keratan sulfate contamination in animal origin chondroitin sulfate

Author:: Odile Francesca Restaino; Rosario Finamore; Paola Diana; Mariacarmela Marseglia; Mario Vitiello; Angela Casillo; Emiliano Bedini; Michelangelo Parrilli; Maria Michela Corsaro; Marco Trifuoggi; Mario De Rosa; Chiara Schiraldi
Source:: Analytica chimica acta 2017 v.958 pp. 59-70
ISSN:: 0003-2670
Subject:: analytical chemistry; animals; anion exchange; anion exchange chromatography; chondroitin sulfate; drugs; functional foods; gas chromatography-mass spectrometry; gel chromatography; manufacturing; molecular weight; nuclear magnetic resonance spectroscopy; proteoglycans; sulfates; tissues
Abstract:: ... Chondroitin sulfate is a glycosaminoglycan widely used as active principle of anti-osteoarthritis drugs and nutraceuticals, manufactured by extraction from animal cartilaginous tissues. During the manufacturing procedures, another glycosaminoglycan, the keratan sulfate, might be contemporarily withdrawn, thus eventually constituting a contaminant difficult to be determined because of its structura ...
DOI:: 10.1016/j.aca.2016.12.005
: https://doi.org/10.1016/j.aca.2016.12.005

6. Accurate and sensitive determination of molar fractions of 13C-Labeled intracellular metabolites in cell cultures grown in the presence of isotopically-labeled glucose

Author:: Mario Fernández-Fernández; Pablo Rodríguez-González; David Hevia Sánchez; Pedro González-Menéndez; Rosa M. Sainz Menéndez; J. Ignacio García Alonso
Source:: Analytica chimica acta 2017 v.969 pp. 35-48
ISSN:: 0003-2670
Subject:: analytical chemistry; cell culture; gas chromatography-mass spectrometry; glucose; hydrogen; isotopes; metabolism; metabolites; prostatic neoplasms; regression analysis; spectrometers
Abstract:: ... This work describes a methodology based on multiple linear regression and GC-MS for the determination of molar fractions of isotopically-labeled intracellular metabolites in cell cultures. Novel aspects of this work are: i) the calculation of theoretical isotopic distributions of the different isotopologues from an experimentally measured value of % 13C enrichment of the labeled precursor ii) the ...
DOI:: 10.1016/j.aca.2017.03.019
: https://doi.org/10.1016/j.aca.2017.03.019

7. Bayesian approach to peak deconvolution and library search for high resolution gas chromatography – Mass spectrometry

Author:: A. Barcaru; H.G.J. Mol; M. Tienstra; G. Vivó-Truyols
Source:: Analytica chimica acta 2017 pp. -
ISSN:: 0003-2670
Subject:: Bayesian theory; algorithms; analytical chemistry; gas chromatography-mass spectrometry; models; pesticides; uncertainty
Abstract:: ... A novel probabilistic Bayesian strategy is proposed to resolve highly co-eluting peaks in high-resolution GC-MS (Orbitrap) data. Opposed to a deterministic approach, we propose to solve the problem probabilistically, using a complete pipeline. First, the retention time(s) for a (probabilistic) number of compounds for each mass channel are estimated. The statistical dependency between m/z channels ...
DOI:: 10.1016/j.aca.2017.06.044
: https://doi.org/10.1016/j.aca.2017.06.044

8. Determination of total cyanide in soil by isotope dilution GC/MS following pentafluorobenzyl derivatization

Author:: Beatrice Campanella; Lorenzo Biancalana; Lucia D'Ulivo; Massimo Onor; Emilia Bramanti; Zoltan Mester; Enea Pagliano
Source:: Analytica chimica acta 2017 pp. -
ISSN:: 0003-2670
Subject:: acetone; analytical chemistry; derivatization; detection limit; digestion; gas chromatography-mass spectrometry; hydrogen cyanide; ionization; isotope dilution technique; phosphoric acid; sodium hydroxide; soil; soil sampling; toxicity
Abstract:: ... The high toxicity of cyanide, along with its widespread industrial use, has fuelled interest in the development of analytical methods for its determination in complex matrices. In this study, we propose a novel approach for the measurement of total cyanide in soil samples based on single-step derivatization with pentafluorobenzyl bromide (F5Bn−Br) followed by quantitation with gas chromatography m ...
DOI:: 10.1016/j.aca.2017.01.026
: https://doi.org/10.1016/j.aca.2017.01.026

9. Development of a GC/MS method for the qualitative and quantitative analysis of mixtures of free fatty acids and metal soaps in paint samples

Author:: Jacopo La Nasa; Francesca Modugno; Matteo Aloisi; Anna Lluveras Tenorio; Ilaria Bonaduce
Source:: Analytica chimica acta 2017 pp. -
ISSN:: 0003-2670
Subject:: aluminum; analytical chemistry; cadmium; calcium; cobalt; copper; derivatization; experimental design; free fatty acids; gas chromatography-mass spectrometry; guidelines; lead; magnesium; manganese; models; palmitates; quantitative analysis; soaps; sodium; stearic acid; zinc
Abstract:: ... In this paper we present a new analytical GC/MS method for the analysis of mixtures of free fatty acids and metal soaps in paint samples. This approach is based on the use of two different silylating agents: N,O-bis(trimethylsilyl)trifluoroacetamide (BSTFA) and 1,1,1,3,3,3-hexamethyldisilazane (HMDS).Our experimentation demonstrated that HMDS does not silylate fatty acid carboxylates, so it can be ...
DOI:: 10.1016/j.aca.2017.11.017
: https://doi.org/10.1016/j.aca.2017.11.017

10. Development of a modified QuEChERS method for multi-class pesticide analysis in human hair by GC-MS and UPLC-MS/MS

Author:: Edouard Lehmann; Christelle Oltramare; Luiz Felippe de Alencastro
Source:: Analytica chimica acta 2017 pp. -
ISSN:: 0003-2670
Subject:: analytical chemistry; atrazine; detection limit; environmental monitoring; gas chromatography-mass spectrometry; hairs; humans; imidacloprid; pyrethrins; sorbents; vegetable growing
Abstract:: ... The present study assessed the suitability of using QuEChERS procedure for the simultaneous determination and quantification of 37 multi-class pesticides in human hair. Matrix co-eluted material had a large influence on instrumental response sensitivity. Purification was needed although dSPE cleanup sorbent selection critically influenced analyte recovery. Optimized protocol using Z-Sep+sorbent su ...
DOI:: 10.1016/j.aca.2017.11.009
: https://doi.org/10.1016/j.aca.2017.11.009

11. Discrimination of bacteria by rapid sensing their metabolic volatiles using an aspiration-type ion mobility spectrometer (a-IMS) and gas chromatography-mass spectrometry GC-MS

Author:: Ileana Andreea Ratiu; Victor Bocos-Bintintan; Adrian Patrut; Victor Hugo Moll; Matthew Turner; C.L. Paul Thomas
Source:: Analytica chimica acta 2017 pp. -
ISSN:: 0003-2670
Subject:: Staphylococcus aureus; ionization; qualitative analysis; headspace analysis; bacteria; data collection; air; information processing; Escherichia coli; gas chromatography-mass spectrometry; electric field; microbial culture; monitoring; models; principal component analysis; detectors; electrical equipment; culture media; adsorption; ions; spectrometers; Bacillus subtilis; desorption
Abstract:: ... The objective of our study was to investigate whether one may quickly and reliably discriminate different microorganism strains by direct monitoring of the headspace atmosphere above their cultures. Headspace samples above a series of in vitro bacterial cultures were directly interrogated using an aspiration type ion mobility spectrometer (a-IMS), which produced distinct profiles (“fingerprints”) ...
DOI:: 10.1016/j.aca.2017.06.031
: https://doi.org/10.1016/j.aca.2017.06.031

12. Fabrication of a polymeric composite incorporating metal-organic framework nanosheets for solid-phase microextraction of polycyclic aromatic hydrocarbons from water samples

Author:: Songbo Wei; Wei Lin; Jianqiao Xu; Ying Wang; Shuqin Liu; Fang Zhu; Yuan Liu; Gangfeng Ouyang
Source:: Analytica chimica acta 2017 pp. -
ISSN:: 0003-2670
Subject:: analytical chemistry; coatings; composite polymers; coordination polymers; desorption; detection limit; gas chromatography-mass spectrometry; nanosheets; polycyclic aromatic hydrocarbons; scanning electron microscopes; solid phase microextraction; stainless steel
Abstract:: ... In this contribution, it was discovered that even distribution of a metal-organic framework (MOF) [e.g. copper 1,4-benzenedicarboxylate (CBDC)] within polymeric matrixes (e.g. polyimide) resulted in a high-efficient coating material on the surface of a stainless steel wire (SSW). Consequently, a home-made solid phase microextraction (SPME) fiber was fabricated for fast determination of target anal ...
DOI:: 10.1016/j.aca.2017.04.005
: https://doi.org/10.1016/j.aca.2017.04.005

13. GC-MS based metabolomics of colon cancer cells using different extraction solvents

Author:: Clara Ibáñez; Carolina Simó; Mine Palazoglu; Alejandro Cifuentes
Source:: Analytica chimica acta 2017 pp. -
ISSN:: 0003-2670
Subject:: amino acids; amino sugars; analytical chemistry; capillary electrophoresis; colorectal neoplasms; fatty acids; gas chromatography-mass spectrometry; glutathione; liquid chromatography; mammals; metabolites; metabolome; metabolomics; neoplasm cells; solvents
Abstract:: ... The increasing incidence of colorectal cancer enforces the development of novel methodologies and protocols to deepen in the molecular mechanisms that govern disease pathophysiological events. The aim of this work is to deepen in the optimum metabolite extraction protocol from adherent mammalian cells of colon cancer for high throughput metabolomics using gas chromatography coupled to mass spectro ...
DOI:: 10.1016/j.aca.2017.07.019
: https://doi.org/10.1016/j.aca.2017.07.019

14. Identification of sink spots in two thermal desorption GC/MS systems for the analysis of polycyclic aromatic hydrocarbons

Author:: Yingjie Li; Jiping Zhu
Source:: Analytica chimica acta 2017 pp. -
ISSN:: 0003-2670
Subject:: analytical chemistry; desorption; gas chromatography-mass spectrometry; polycyclic aromatic hydrocarbons; vapors; volatile organic compounds
Abstract:: ... Thermal desorption (TD) GC/MS has been used for the analysis of polycyclic aromatic hydrocarbons (PAHs) and other semi-volatile organic compounds. However, thermal desorption recovery of PAHs have not been well studied and the cause of PAH residues in a TD system has not been clearly understood. Our results showed that low volatility of PAHs can lead to their incomplete recovery in a TD system: fo ...
DOI:: 10.1016/j.aca.2017.01.053
: https://doi.org/10.1016/j.aca.2017.01.053

15. Inter-laboratory validation of a thin film microextraction technique for determination of pesticides in surface water samples

Author:: Hamed Piri-Moghadam; Emanuela Gionfriddo; Angel Rodriguez-Lafuente; Jonathan J. Grandy; Heather L. Lord; Terry Obal; Janusz Pawliszyn
Source:: Analytica chimica acta 2017 pp. -
ISSN:: 0003-2670
Subject:: analytical chemistry; desorption; detection limit; gas chromatography-mass spectrometry; liquid-liquid extraction; microextraction; pesticides; polydimethylsiloxane; surface water; wastes; Ontario
Abstract:: ... The primary goal of the present study is the inter-laboratory evaluation of a thin film microextraction (TFME) technique to be used as an alternative approach to liquid-liquid extraction (LLE). Polydimethylsiloxane/divinylbenzene (PDMS/DVB) and PDMS/DVB-carbon mesh supported membranes were used for the extraction of 23 targeted pesticides, while a thermal desorption unit (TDU) was employed to tran ...
DOI:: 10.1016/j.aca.2017.02.014
: https://doi.org/10.1016/j.aca.2017.02.014

16. Magnetic headspace adsorptive extraction of chlorobenzenes prior to thermal desorption gas chromatography-mass spectrometry

Author:: Lorena Vidal; Mazaher Ahmadi; Elena Fernández; Tayyebeh Madrakian; Antonio Canals
Source:: Analytica chimica acta 2017 pp. -
ISSN:: 0003-2670
Subject:: cost effectiveness; desorption; detection limit; gas chromatography-mass spectrometry; graphene oxide; headspace analysis; ionic strength; iron oxides; magnetic materials; mixing; models; nanoparticles; neodymium; solid phase extraction; sorbents
Abstract:: ... This study presents a new, user-friendly, cost-effective and portable headspace solid-phase extraction technique based on graphene oxide decorated with iron oxide magnetic nanoparticles as sorbent, located on one end of a small neodymium magnet. Hence, the new headspace solid-phase extraction technique has been called Magnetic Headspace Adsorptive Extraction (Mag-HSAE). In order to assess Mag-HSAE ...
DOI:: 10.1016/j.aca.2017.04.002
: https://doi.org/10.1016/j.aca.2017.04.002

17. Marker discovery in volatolomics based on systematic alignment of GC-MS signals: Application to food authentication

Author:: S. Abou-el-karam; J. Ratel; N. Kondjoyan; C. Truan; E. Engel
Source:: Analytica chimica acta 2017 pp. -
ISSN:: 0003-2670
Subject:: analytical chemistry; discriminant analysis; gas chromatography-mass spectrometry; models; product authenticity; vegetable oil; volatile organic compounds
Abstract:: ... Starting with an experiment to authenticate walnut oils based on GC-MS analysis of the volatolome, this paper aims to demonstrate the relevance of a two-step alignment-based strategy for the systematic research of VOC markers. The first step of the treatment consists of roughly reducing the time shifts with efficient, known warping techniques like COW (Correlation Optimized Warping). The second st ...
DOI:: 10.1016/j.aca.2017.08.019
: https://doi.org/10.1016/j.aca.2017.08.019

18. Quantification ethyl carbamate in wines using reaction-assisted-extraction with 9-xanthydrol and detection by heart-cutting multidimensional gas chromatography-mass spectrometry

Author:: Qiqi Tu; Wanshu Qi; Junbo Zhao; Li Zhang; Yinlong Guo
Source:: Analytica chimica acta 2017 pp. -
ISSN:: 0003-2670
Subject:: analytical chemistry; detection limit; ethyl carbamate; gas chromatography-mass spectrometry; sodium chloride; temperature; wines
Abstract:: ... 9-Xanthydrol was introduced as an assisted-extraction-reagent to quantify ethyl carbamate (EC) in wines by heart-cutting multidimensional gas chromatography coupled with mass spectrometry (MDGC-MS). 9-Xanthydrol could help to increase the extraction efficiency, because it could react with ethyl carbamate to form the low-polar product, which facilitated the transfer of ethyl carbamate into organic ...
DOI:: 10.1016/j.aca.2017.11.022
: https://doi.org/10.1016/j.aca.2017.11.022

19. Rapid determination of nitrate in vegetables by gas chromatography mass spectrometry

Author:: Beatrice Campanella; Massimo Onor; Enea Pagliano
Source:: Analytica chimica acta 2017 pp. -
ISSN:: 0003-2670
Subject:: gas chromatography-mass spectrometry; headspace analysis; ionization; isotope dilution technique; nitrates; nitrites; raw vegetables; vegetables
Abstract:: ... In this study we present a novel isotope dilution gas chromatography method for the determination of nitrate in vegetables. The analyte was extracted in water at 70∘ C and mixed with isotopically enriched NO3−15 internal standard. The sample was centrifuged and the supernatant reacted with sulfamic acid for removal of nitrite, and with triethyloxonium tetrafluoroborate for converting NO3− into vol ...
DOI:: 10.1016/j.aca.2017.04.053
: https://doi.org/10.1016/j.aca.2017.04.053

20. Use of chemical conversion for determination of nitrated aromatic hydrocarbons using femtosecond ionization mass spectrometry

Author:: Takuya Fujii; Tomoko Imasaka; Totaro Imasaka
Source:: Analytica chimica acta 2017 pp. -
ISSN:: 0003-2670
Subject:: analytical chemistry; catalysts; diesel engines; gas chromatography-mass spectrometry; hydrazine; ionization; palladium; platinum; polycyclic aromatic hydrocarbons
Abstract:: ... A sample containing nitrated aromatic hydrocarbons (NPAHs) was injected into the sample inlet port of a gas chromatograph (GC), along with hydrazine, a reducing reagent. The analytes that eluted from the GC column were measured by mass spectrometry (MS) using an ultraviolet femtosecond laser as the ionization source. When no reducing reagent was used, large numbers of polycyclic aromatic hydrocarb ...
DOI:: 10.1016/j.aca.2017.09.049
: https://doi.org/10.1016/j.aca.2017.09.049

21. A simple approach for the preparation of simazine molecularly imprinted nanofibers via self-polycondensation for selective solid-phase microextraction

Author:: Mohammad Saraji; Narges Mehrafza
Source:: Analytica chimica acta 2016 pp. -
ISSN:: 0003-2670
Subject:: ambient temperature; coatings; desorption; detection limit; gas chromatography-mass spectrometry; mixing; molecular imprinting; nanofibers; pH; salt concentration; siloxanes; simazine; solid phase microextraction; stainless steel; statistical analysis
Abstract:: ... A novel molecularly imprinted sol-gel material based on polysiloxane nanofiber was introduced as a solid-phase microextraction coating on a stainless steel wire for the extraction of simazine. The nanostructured molecularly imprinted fiber was prepared by a simple single step method at room temperature, using methyltriethoxysilane as the sol-gel precursor and simazine as the template molecule. The ...
DOI:: 10.1016/j.aca.2016.06.050
: https://doi.org/10.1016/j.aca.2016.06.050

22. A systematic study on the effect of noise and shift on multivariate figures of merit of second-order calibration algorithms

Author:: Mohammad Ahmadvand; Hadi Parastar; Hassan Sereshti; Alejandro Olivieri; Roma Tauler
Source:: Analytica chimica acta 2016 pp. -
ISSN:: 0003-2670
Subject:: detection limit; analytical chemistry; phenanthrenes; anthracenes; data collection; factor analysis; least squares; algorithms; gas chromatography-mass spectrometry
Abstract:: ... In the present study, multivariate analytical figures of merit (AFOM) for three well-known second-order calibration algorithms, parallel factor analysis (PARAFAC), PARAFAC2 and multivariate curve resolution-alternating least squares (MCR-ALS), were investigated in simulated hyphenated chromatographic systems including different artifacts (e.g., noise and peak shifts). Different two- and three-comp ...
DOI:: 10.1016/j.aca.2016.11.070
: https://doi.org/10.1016/j.aca.2016.11.070

23. Analysis of odour compounds from scented consumer products using gas chromatography-mass spectrometry and gas chromatography-olfactometry

Author:: Jennifer Bartsch; Erik Uhde; Tunga Salthammer
Source:: Analytica chimica acta 2016 v.904 pp. 98-106
ISSN:: 0003-2670
Subject:: air; allergenicity; allergens; analytical chemistry; benzyl alcohol; citronellol; desorption; emissions; eugenol; gas chromatography-mass spectrometry; humans; ingredients; limonene; linalool; nose; odor compounds; odors; smell; volatile organic compounds
Abstract:: ... Scented consumer products are being bought in increasing amounts and gaining more popularity. There is, however, relatively little information available about their ingredients, emissions and allergenic potential. Frequently, a mixture of different fragrance substances and not solely an individual substance contributes to the overall desired smell. The aim of this study was to investigate the odor ...
DOI:: 10.1016/j.aca.2015.11.031
: https://doi.org/10.1016/j.aca.2015.11.031

24. Analysis of the major chiral compounds of Artemisia herba-alba essential oils (EOs) using reconstructed vibrational circular dichroism (VCD) spectra: En route to a VCD chiral signature of EOs

Author:: Mohammed El-Amin Said; Pierre Vanloot; Isabelle Bombarda; Jean-Valère Naubron; El Montassir Dahmane; Ahmed Aamouche; Marion Jean; Nicolas Vanthuyne; Nathalie Dupuy; Christian Roussel
Source:: Analytica chimica acta 2016 v.903 pp. 121-130
ISSN:: 0003-2670
Subject:: Artemisia herba-alba; analytical chemistry; circular dichroism spectroscopy; enantiomers; essential oils; gas chromatography-mass spectrometry; high performance liquid chromatography; information sources; mathematical models; polarimetry; stereoisomerism
Abstract:: ... An unprecedented methodology was developed to simultaneously assign the relative percentages of the major chiral compounds and their prevailing enantiomeric form in crude essential oils (EOs). In a first step the infrared (IR) and vibrational circular dichroism (VCD) spectra of the crude essential oils were recorded and in a second step they were modelized as a linear weighted combination of the I ...
DOI:: 10.1016/j.aca.2015.11.010
: https://doi.org/10.1016/j.aca.2015.11.010

25. Analytical methods for the determination of mixtures of bisphenols and derivatives in human and environmental exposure sources and biological fluids. A review

Author:: N. Caballero-Casero; L. Lunar; S. Rubio
Source:: Analytica chimica acta 2016 v.908 pp. 22-53
ISSN:: 0003-2670
Subject:: adverse effects; analytical chemistry; bisphenol A; derivatization; environmental exposure; evaporation; gas chromatography-mass spectrometry; humans; liquid chromatography; risk; risk assessment process; solvents; tandem mass spectrometry; toxicity
Abstract:: ... Bisphenol A (BPA) is ubiquitous in humans and the environment. Its potential adverse effects through genomic and non-genomic pathways have fostered BPA replacement by bisphenol analogs that, unfortunately, exert similar adverse effects. Many of these analogs, as well as their derivatives, have already found in humans and the environment and major concerns have arisen over their low dose- and mixtu ...
DOI:: 10.1016/j.aca.2015.12.034
: https://doi.org/10.1016/j.aca.2015.12.034

26. Combined untargeted and targeted fingerprinting with comprehensive two-dimensional chromatography for volatiles and ripening indicators in olive oil

Author:: Federico Magagna; Lucia Valverde-Som; Cristina Ruíz-Samblás; Luis Cuadros-Rodríguez; Stephen E. Reichenbach; Carlo Bicchi; Chiara Cordero
Source:: Analytica chimica acta 2016 pp. -
ISSN:: 0003-2670
Subject:: analytical chemistry; comprehensive two-dimensional gas chromatography; computer software; extra-virgin olive oil; fruits; gas chromatography-mass spectrometry; image analysis; octane; olives; ripening; sensory properties; volatile organic compounds; Spain
Abstract:: ... Comprehensive two-dimensional gas chromatography (GC × GC) is the most effective multidimensional separation technique for in-depth investigations of complex samples of volatiles (VOC) in food. However, each analytical run produces dense, multi-dimensional data, so elaboration and interpretation of chemical information is challenging.This study exploits recent advances of GC × GC-MS chromatographi ...
DOI:: 10.1016/j.aca.2016.07.005
: https://doi.org/10.1016/j.aca.2016.07.005

27. Development of a method for enhancing metabolomics coverage of human sweat by gas chromatography–mass spectrometry in high resolution mode

Author:: M.M. Delgado-Povedano; M. Calderón-Santiago; F. Priego-Capote; M.D. Luque de Castro
Source:: Analytica chimica acta 2016 v.905 pp. 115-125
ISSN:: 0003-2670
Subject:: amino acids; analytical chemistry; biochemical pathways; biomarkers; cystic fibrosis; dicarboxylic acids; gas chromatography-mass spectrometry; humans; metabolites; metabolome; metabolomics; myo-inositol; sweat
Abstract:: ... Sweat has recently gained popularity as clinical sample in metabolomics analysis as it is a non-invasive biofluid the composition of which could be modified by certain pathologies, as is the case with cystic fibrosis that increases chloride levels in sweat. However, the whole composition of sweat is still unknown and there is a lack of analytical strategies for sweat analysis. The aim of the prese ...
DOI:: 10.1016/j.aca.2015.11.048
: https://doi.org/10.1016/j.aca.2015.11.048

28. Development of an indirect ELISA for the determination of ethyl carbamate in Chinese rice wine

Author:: Lin Luo; Hong-Tao Lei; Jin-Yi Yang; Gong-Liang Liu; Yuan-Ming Sun; Wei-Dong Bai; Hong Wang; Yu-Dong Shen; Sui Chen; Zhen-Lin Xu
Source:: Analytica chimica acta 2016 pp. -
ISSN:: 0003-2670
Subject:: analytical chemistry; carcinogens; cross reaction; derivatization; detection limit; enzyme-linked immunosorbent assay; ethyl carbamate; gas chromatography-mass spectrometry; haptens; monitoring; polyclonal antibodies; public health; rice wines
Abstract:: ... The widespread occurrence of ethyl carbamate (EC, 89.09 Da), a group 2A carcinogen, in fermented foods and alcoholic beverages has raised worldwide public health concern. Immunoassay for EC is unavailable due to the simple and small structure of EC. In this work, an initial attempt to produce antibody specific for EC, by using 4-((ethoxycarbonyl)amino)butanoic acid as hapten, was made but failed. ...
DOI:: 10.1016/j.aca.2016.11.008
: https://doi.org/10.1016/j.aca.2016.11.008

29. Effective methylation of phosphonic acids related to chemical warfare agents mediated by trimethyloxonium tetrafluoroborate for their qualitative detection and identification by gas chromatography-mass spectrometry

Author:: Carlos A. Valdez; Roald N. Leif; Armando Alcaraz
Source:: Analytica chimica acta 2016 pp. -
ISSN:: 0003-2670
Subject:: ambient temperature; analytical chemistry; byproducts; derivatization; esters; fatty acids; gas chromatography-mass spectrometry; hydrolysis; methylation; methylene chloride; nerve agents; phosphorous acid; solvents
Abstract:: ... The effective methylation of phosphonic acids related to chemical warfare agents (CWAs) employing trimethyloxonium tetrafluoroborate (TMO·BF4) for their qualitative detection and identification by gas chromatography-mass spectrometry (GC-MS) is presented. The methylation occurs in rapid fashion (1 h) and can be conveniently carried out at ambient temperature, thus providing a safer alternative to ...
DOI:: 10.1016/j.aca.2016.05.034
: https://doi.org/10.1016/j.aca.2016.05.034

30. Evaluation of gas chromatography – Electron ionization – Full scan high resolution Orbitrap mass spectrometry for pesticide residue analysis

Author:: Hans G.J. Mol; Marc Tienstra; Paul Zomer
Source:: Analytica chimica acta 2016 pp. -
ISSN:: 0003-2670
Subject:: European Union; analytical chemistry; gas chromatography-mass spectrometry; ionization; iso-octanes; leeks; pesticide residues; pesticides; screening; solvents; tomatoes
Abstract:: ... Gas chromatography with electron ionization and full scan high resolution mass spectrometry with an Orbitrap mass analyzer (GC-EI-full scan Orbitrap HRMS) was evaluated for residue analysis. Pesticides in fruit and vegetables were taken as an example application.The relevant aspects for GC-MS based residue analysis, including the resolving power (15,000 to 120,000 FWHM at m/z 200), scan rate, dyna ...
DOI:: 10.1016/j.aca.2016.06.017
: https://doi.org/10.1016/j.aca.2016.06.017

31. Extension of the two-dimensional mass channel cluster plot method to fast separations utilizing low thermal mass gas chromatography with time-of-flight mass spectrometry

Author:: Brian D. Fitz; Robert E. Synovec
Source:: Analytica chimica acta 2016 v.913 pp. 160-170
ISSN:: 0003-2670
Subject:: analytical chemistry; data collection; gas chromatography-mass spectrometry; heat; least squares
Abstract:: ... Implementation of a data reduction and visualization method for use with high-speed gas chromatography and time-of-flight mass spectrometry (GC-TOFMS) is reported. The method, called the “2D m/z cluster method” facilitates analyte detection, deconvolution, and identification, by accurately measuring peak widths and retention times using a fast TOFMS sampling frequency (500 Hz). Characteristics and ...
DOI:: 10.1016/j.aca.2016.01.045
: https://doi.org/10.1016/j.aca.2016.01.045

32. Gas chromatographic determination of perfluorocarboxylic acids in aqueous samples – A tutorial review

Author:: Umer Shafique; Stefanie Schulze; Christian Slawik; Stefan Kunz; Albrecht Paschke; Gerrit Schüürmann
Source:: Analytica chimica acta 2016 pp. -
ISSN:: 0003-2670
Subject:: acids; analytical chemistry; derivatization; detection limit; gas chromatography-mass spectrometry; isomers; liquid chromatography; tandem mass spectrometry
Abstract:: ... Determination of perfluorocarboxylic acids (PFCAs) by gas chromatography (GC) has been undertaken since 1980. However, only small number of studies can be found in the literature due to the major drawbacks associated with the GC determination of PFCAs such as high detection limits, a small range of analytes, long analysis time, and laborious derivatization prior to chromatographic separation. Liqu ...
DOI:: 10.1016/j.aca.2016.10.026
: https://doi.org/10.1016/j.aca.2016.10.026

33. In situ hydrothermal growth of ZnO/g-C3N4 nanoflowers coated solid-phase microextraction fibers coupled with GC-MS for determination of pesticides residues

Author:: Ning Zhang; Jia Gao; Chuanhui Huang; Wei Liu; Ping Tong; Lan Zhang
Source:: Analytica chimica acta 2016 pp. -
ISSN:: 0003-2670
Subject:: analytical chemistry; carbon nitride; coatings; cucumbers; detection limit; gas chromatography-mass spectrometry; green tea; pears; pesticide residues; solid phase microextraction; statistical analysis; zinc oxide
Abstract:: ... In this paper, Zinc oxide (ZnO) hybridized with graphite-like C3N4 (ZnO/g-C3N4) nanoflowers based solid phase microextraction (SPME) coating was prepared on fiber using in situ hydrothermal growth method for gas chromatographic -mass spectrum (GC- MS) separation and analysis target analytes in complex matrixes for the first time. The proposed hybrid ZnO/g-C3N4 fiber exhibited wide linearity for th ...
DOI:: 10.1016/j.aca.2016.06.029
: https://doi.org/10.1016/j.aca.2016.06.029

34. Layer-by-layer functionalized porous Zinc sulfide nanospheres-based solid-phase extraction combined with liquid chromatography time-of-flight/mass and gas chromatography-mass spectrometry for the specific enrichment and identification of alkaloids from Crinum asiaticum var. sinicum

Author:: Dong Zhu; Zhao Yi Miao; Rui Xiang Yang; Hong Mei Wen; Wei Li; Jun Chen; An Kang; Chen-Xiao Shan; Sheng Yu; Yue Hu
Source:: Analytica chimica acta 2016 v.932 pp. 60-68
ISSN:: 0003-2670
Subject:: Crinum asiaticum; acrylic acid; adsorbents; alkaloids; analytical chemistry; gas chromatography-mass spectrometry; liquid chromatography; nanospheres; nitrogen; polyacrylic acid; solid phase extraction; zinc sulfide
Abstract:: ... The current widely utilized polymer or C8, C18 end-capped material-based sorbents for solid-phase extraction could not capture alkaloids well only based on “like dissolves like” principle. In this paper, a layer-by-layer functionalized porous Zinc sulfide nanospheres-based solid-phase extraction (SPE) combined with liquid chromatography time-of-flight/mass spectrometry (LC-TOF/MS) and gas chromato ...
DOI:: 10.1016/j.aca.2016.05.028
: https://doi.org/10.1016/j.aca.2016.05.028

35. One step derivatization with British Anti-Lewsite in combination with gas chromatography coupled to triple-quadrupole tandem mass spectrometry for the fast and selective analysis of inorganic arsenic in rice

Author:: Ju Hui Kang; Hyun Jeong Jung; Mun Yhung Jung
Source:: Analytica chimica acta 2016 pp. -
ISSN:: 0003-2670
Subject:: analytical chemistry; arsenic; derivatization; detection limit; gas chromatography-mass spectrometry; rice; tandem mass spectrometry; temperature
Abstract:: ... We developed a new fast and selective analytical method for the determination of inorganic arsenic (iAs) in rice by a gas chromatography – tandem mass spectrometry (GC-MS/MS) in combination with one step derivatization of inorganic arsenic (iAs) with British Anti-Lewsite (BAL). Two step derivatization of iAs with BAL has been previously performed for the GC-MS analysis. In this paper, the quantita ...
DOI:: 10.1016/j.aca.2016.05.046
: https://doi.org/10.1016/j.aca.2016.05.046

36. Postprandial metabolomics: A pilot mass spectrometry and NMR study of the human plasma metabolome in response to a challenge meal

Author:: Masoumeh Karimpour; Izabella Surowiec; Junfang Wu; Sandra Gouveia-Figueira; Rui Pinto; Johan Trygg; Angela M. Zivkovic; Malin L. Nording
Source:: Analytica chimica acta 2016 v.908 pp. 121-131
ISSN:: 0003-2670
Subject:: 3-hydroxybutyric acid; amino acids; analytical chemistry; diet; fasting; gas chromatography-mass spectrometry; humans; hydrophobicity; liquid chromatography; metabolic diseases; metabolism; metabolites; metabolome; metabolomics; multivariate analysis; nuclear magnetic resonance spectroscopy; phenotype; postprandial state; sugars
Abstract:: ... The study of postprandial metabolism is relevant for understanding metabolic diseases and characterizing personal responses to diet. We combined three analytical platforms – gas chromatography-mass spectrometry (GC-MS), liquid chromatography-mass spectrometry (LC-MS) and nuclear magnetic resonance (NMR) – to validate a multi-platform approach for characterizing individual variation in the postpran ...
DOI:: 10.1016/j.aca.2015.12.009
: https://doi.org/10.1016/j.aca.2015.12.009

37. Potential of atmospheric pressure chemical ionization source in gas chromatography tandem mass spectrometry for the screening of urinary exogenous androgenic anabolic steroids

Author:: M. Raro; T. Portolés; E. Pitarch; J.V. Sancho; F. Hernández; L. Garrostas; J. Marcos; R. Ventura; J. Segura; O.J. Pozo
Source:: Analytica chimica acta 2016 v.906 pp. 128-138
ISSN:: 0003-2670
Subject:: anabolic steroids; analytical chemistry; atmospheric pressure; derivatization; detection limit; enzymatic hydrolysis; gas chromatography-mass spectrometry; ionization; ions; liquid-liquid extraction; monitoring; screening; tandem mass spectrometry; urine
Abstract:: ... The atmospheric pressure chemical ionization (APCI) source for gas chromatography-mass spectrometry analysis has been evaluated for the screening of 16 exogenous androgenic anabolic steroids (AAS) in urine. The sample treatment is based on the strategy currently applied in doping control laboratories i.e. enzymatic hydrolysis, liquid–liquid extraction (LLE) and derivatization to form the trimethyl ...
DOI:: 10.1016/j.aca.2015.11.041
: https://doi.org/10.1016/j.aca.2015.11.041

38. Toward automated chromatographic fingerprinting: A non-alignment approach to gas chromatography mass spectrometry data

Author:: Jochen Vestner; Gilles de Revel; Sibylle Krieger-Weber; Doris Rauhut; Maret du Toit; André de Villiers
Source:: Analytica chimica acta 2016 v.911 pp. 42-58
ISSN:: 0003-2670
Subject:: analytical chemistry; data collection; deformation; detectors; gas chromatography-mass spectrometry; models; volatile compounds; wines
Abstract:: ... In contrast to targeted analysis of volatile compounds, non-targeted approaches take information of known and unknown compounds into account, are inherently more comprehensive and give a more holistic representation of the sample composition. Although several non-targeted approaches have been developed, there's still a demand for automated data processing tools, especially for complex multi-way da ...
DOI:: 10.1016/j.aca.2016.01.020
: https://doi.org/10.1016/j.aca.2016.01.020

39. A molecularly imprinted polymer as the sorptive phase immobilized in a rotating disk extraction device for the determination of diclofenac and mefenamic acid in wastewater

Author:: Valentina Manzo; Karla Ulisse; Inés Rodríguez; Eduardo Pereira; Pablo Richter
Source:: Analytica chimica acta 2015 v.889 pp. 130-137
ISSN:: 0003-2670
Subject:: acetaminophen; derivatization; desorption; detection limit; diclofenac; diphenylamine; gas chromatography-mass spectrometry; methanol; microextraction; molecular imprinting; nonsteroidal anti-inflammatory agents; pH; polymers; scanning electron microscopy; statistical analysis; wastewater; wastewater treatment; Chile
Abstract:: ... The microextraction of diclofenac and mefenamic acid from water samples was performed by using rotating disk sorptive extraction (RDSE) with molecularly imprinted polymer (MIP) as the sorptive phase. The MIP was synthesized from the monomer 1-vinylimidazol (VI) together with the cross-linker divinylbenzene (DVB) using diphenylamine as the template molecule. Scanning electron microscopy (SEM) analy ...
DOI:: 10.1016/j.aca.2015.07.038
: https://doi.org/10.1016/j.aca.2015.07.038

40. Analysis of chemical profiles of insect adhesion secretions by gas chromatography–mass spectrometry

Author:: Manuela Reitz; Heike Gerhardt; Christian Schmitt; Oliver Betz; Klaus Albert; Michael Lämmerhofer
Source:: Analytica chimica acta 2015 v.854 pp. 47-60
ISSN:: 0003-2670
Subject:: Schistocerca gregaria; acid hydrolysis; adhesion; aldehydes; alkanes; ambient temperature; arabinose; carbon; chemical analysis; compliance; emulsions; galactose; gas chromatography-mass spectrometry; glucose; insects; long chain fatty acids; nuclear magnetic resonance spectroscopy; ornithine; solid phase microextraction; solvents; tibia; xylose
Abstract:: ... This article reports on the chemical analysis of molecular profiles of tarsal secretions of the desert locust Schistocerca gregaria (Forsskål, 1775) by gas chromatography hyphenated with quadrupol mass spectrometry (GC–MS) as well as 1H-nuclear magnetic resonance (1H NMR) spectroscopy. Special focus of this study was to elaborate on sampling methods which enable selective microscale extraction of ...
DOI:: 10.1016/j.aca.2014.10.056
: https://doi.org/10.1016/j.aca.2014.10.056

41. DATINK pilot study: An effective methodology for ballpoint pen ink dating in questioned documents

Author:: I. San Román; L. Bartolomé; M.L. Alonso; R.M. Alonso; M. Ezcurra
Source:: Analytica chimica acta 2015 v.892 pp. 105-114
ISSN:: 0003-2670
Subject:: analytical chemistry; equations; forensic sciences; gas chromatography-mass spectrometry; mathematical models; solid phase microextraction; solvents; statistical analysis
Abstract:: ... Establishing the approximate age of an ink entry from a questioned document is often a complicated task and a controversial issue in forensic sciences. Among the existing approaches, the analysis of solvents in ballpoint inks may be a useful parameter for determining the age of ink on paper. In recent years, several ink dating methods have been proposed. These methods have been based on the analys ...
DOI:: 10.1016/j.aca.2015.08.038
: https://doi.org/10.1016/j.aca.2015.08.038

42. Determination of 13 endocrine disrupting chemicals in sediments by gas chromatography–mass spectrometry using subcritical water extraction coupled with dispersed liquid–liquid microextraction and derivatization

Author:: Ke Yuan; Haining Kang; Zhenfeng Yue; Lihua Yang; Li Lin; Xiaowei Wang; Tiangang Luan
Source:: Analytica chimica acta 2015 v.866 pp. 41-47
ISSN:: 0003-2670
Subject:: acetone; analytical chemistry; derivatization; detection limit; diethylstilbestrol; endocrine-disrupting chemicals; gas chromatography-mass spectrometry; liquid-phase microextraction; quantitative analysis; rivers; sediments; solvents; statistical analysis; temperature
Abstract:: ... In this study, a sample pretreatment method was developed for the determination of 13 endocrine disrupting chemicals (EDCs) in sediment samples based on the combination of subcritical water extraction (SWE) and dispersed liquid–liquid microextraction (DLLME). The subcritical water that provided by accelerated solvent extractor (ASE) was the sample solution (water) for the following DLLME and the s ...
DOI:: 10.1016/j.aca.2015.02.011
: https://doi.org/10.1016/j.aca.2015.02.011

43. Development of a method for metabolomic analysis of human exhaled breath condensate by gas chromatography–mass spectrometry in high resolution mode

Author:: A. Peralbo-Molina; M. Calderón-Santiago; F. Priego-Capote; B. Jurado-Gámez; M.D. Luque de Castro
Source:: Analytica chimica acta 2015 v.887 pp. 118-126
ISSN:: 0003-2670
Subject:: amides; analytical chemistry; blood serum; esters; fatty acids; gas chromatography-mass spectrometry; humans; liquid-liquid extraction; metabolites; metabolomics; models; screening; solid phase extraction; statistical analysis; urine; vapors; volatile compounds
Abstract:: ... Exhaled breath condensate (EBC) is a promising biofluid scarcely used in clinical analysis despite its non-invasive sampling. The main limitation in the analysis of EBC is the lack of standardized protocols to support validation studies. The aim of the present study was to develop an analytical method for analysis of human EBC by GC–TOF/MS in high resolution mode. Thus, sample preparation strategi ...
DOI:: 10.1016/j.aca.2015.07.008
: https://doi.org/10.1016/j.aca.2015.07.008

44. Extraction of climatic signals from fossil organic compounds in marine sediments up to 11.7Ma old (IODP-U1318)

Author:: Mireia Farrés; Belen Martrat; Ben de Mol; Joan O. Grimalt; Romà Tauler
Source:: Analytica chimica acta 2015 v.879 pp. 1-9
ISSN:: 0003-2670
Subject:: alkanes; chemometrics; cholesterol; climate; fossils; gas chromatography-mass spectrometry; least squares; lipid composition; marine sediments; principal component analysis; squalene; surface temperature; variance; United Kingdom
Abstract:: ... This study focuses on the extraction of climate signals and processes using a combined approach which includes the analysis of a high number of lipid molecules in marine sediments, and the chemometric analysis of the acquired data. Neutral and acidic fractions of marine sediments from site IODP-U1318 (south-west of the UK, Porcupine Seabight) were quantified by GC–MS. The alkenone unsaturation ind ...
DOI:: 10.1016/j.aca.2015.04.051
: https://doi.org/10.1016/j.aca.2015.04.051

45. Fabric phase sorptive extraction: A new sorptive microextraction technique for the determination of non-steroidal anti-inflammatory drugs from environmental water samples

Author:: Inés Racamonde; Rosario Rodil; José Benito Quintana; Benigno José Sieira; Abuzar Kabir; Kenneth G. Furton; Rafael Cela
Source:: Analytica chimica acta 2015 v.865 pp. 22-30
ISSN:: 0003-2670
Subject:: adsorbents; analytical chemistry; coatings; desorption; detection limit; diclofenac; gas chromatography-mass spectrometry; geometry; ibuprofen; ionic strength; ketoprofen; mass transfer; microextraction; monitoring; pH; pollution; river water; wastewater treatment; Spain
Abstract:: ... Fabric phase sorptive extraction (FPSE) is a new, yet very promising member of the sorbent-based sorptive microextraction family. It has simultaneously improved both the extraction sensitivity and the speed of the extraction by incorporating high volume of sol–gel hybrid inorganic–organic sorbents into permeable fabric substrates. The advantages of FPSE have been investigated for the determination ...
DOI:: 10.1016/j.aca.2015.01.036
: https://doi.org/10.1016/j.aca.2015.01.036

46. Fast determination of hydroxylated polychlorinated biphenyls in human plasma by online solid phase extraction coupled to liquid chromatography-tandem mass spectrometry

Author:: Natalia Quinete; Thomas Kraus; Vladimir N. Belov; Christina Aretz; André Esser; Thomas Schettgen
Source:: Analytica chimica acta 2015 v.888 pp. 94-102
ISSN:: 0003-2670
Subject:: analytical chemistry; blood; derivatization; evaporation; gas chromatography-mass spectrometry; humans; liquid chromatography; metabolites; polychlorinated biphenyls; solid phase extraction; tandem mass spectrometry; toxicity
Abstract:: ... Hydroxylated polychlorinated biphenyls (OH-PCBs) have been shown to be strongly retained in human blood causing endocrine-related toxicity, particularly on the thyroid system. Traditionally, analytical methods for the determination of OH-PCBs require labor-intensive and long-time consuming sample preparation with several extraction, evaporation and cleanup procedures steps and, in some cases, deri ...
DOI:: 10.1016/j.aca.2015.06.041
: https://doi.org/10.1016/j.aca.2015.06.041

47. Feasibility of ultra-high performance liquid and gas chromatography coupled to mass spectrometry for accurate determination of primary and secondary phthalate metabolites in urine samples

Author:: Laura Herrero; Sagrario Calvarro; Mario A. Fernández; Jesús Eduardo Quintanilla-López; María José González; Belén Gómara
Source:: Analytica chimica acta 2015 v.853 pp. 625-636
ISSN:: 0003-2670
Subject:: analytical chemistry; biomarkers; detection limit; gas chromatography-mass spectrometry; humans; metabolites; phthalates; statistical analysis; toxic substances; ultra-performance liquid chromatography; urine
Abstract:: ... Phthalates (PAEs) are ubiquitous toxic chemical compounds. During the last few years, some phthalate metabolites (MPAEs) have been proposed as appropriate biomarkers in human urine samples to determine PAE human intake and exposure. So, it is necessary to have fast, easy, robust and validated analytical methods to determine selected MPAEs in urine human samples. Two different instrumental methods ...
DOI:: 10.1016/j.aca.2014.09.043
: https://doi.org/10.1016/j.aca.2014.09.043

48. Gas chromatography coupled to atmospheric pressure ionization mass spectrometry (GC-API-MS): Review

Author:: Du-Xin Li; Lin Gan; Amela Bronja; Oliver J. Schmitz
Source:: Analytica chimica acta 2015 v.891 pp. 43-61
ISSN:: 0003-2670
Subject:: analytical chemistry; atmospheric pressure; gas chromatography-mass spectrometry; geometry; ionization; temperature
Abstract:: ... Although the coupling of GC/MS with atmospheric pressure ionization (API) has been reported in 1970s, the interest in coupling GC with atmospheric pressure ion source was expanded in the last decade. The demand of a “soft” ion source for preserving highly diagnostic molecular ion is desirable, as compared to the “hard” ionization technique such as electron ionization (EI) in traditional GC/MS, whi ...
DOI:: 10.1016/j.aca.2015.08.002
: https://doi.org/10.1016/j.aca.2015.08.002

49. Magnetic N-doped carbon nanotubes: A versatile and efficient material for the determination of polycyclic aromatic hydrocarbons in environmental water samples

Author:: Helvécio Costa Menezes; Stella Maris Resende de Barcelos; Damiana Freire Dias Macedo; Aluir Dias Purceno; Bruno Fernades Machado; Ana Paula Carvalho Teixeira; Rochel Monteiro Lago; Philippe Serp; Zenilda Lourdes Cardeal
Source:: Analytica chimica acta 2015 v.873 pp. 51-56
ISSN:: 0003-2670
Subject:: adsorption; analytical chemistry; carbon nanotubes; detection limit; gas chromatography-mass spectrometry; hybrids; hydrophilicity; hydrophobicity; lakes; magnetic separation; polycyclic aromatic hydrocarbons; solvents; Brazil
Abstract:: ... This paper describes a new, efficient and versatile method for the sampling and preconcentration of PAH in environmental water matrices using special hybrid magnetic carbon nanotubes. These N-doped amphiphilic CNT can be easily dispersed in any aqueous matrix due to the N containing hydrophilic part and at the same time show high efficiency for the adsorption of different PAH contaminants due to t ...
DOI:: 10.1016/j.aca.2015.02.063
: https://doi.org/10.1016/j.aca.2015.02.063

50. Metabolic studies of oxyguno in horses

Author:: April S.Y. Wong; Emmie N.M. Ho; Terence S.M. Wan; Kenneth K.H. Lam; Brian D. Stewart
Source:: Analytica chimica acta 2015 v.891 pp. 190-202
ISSN:: 0003-2670
Subject:: adverse effects; analytical chemistry; biotransformation; blood; blood sampling; drugs; gas chromatography-mass spectrometry; geldings; humans; hydroxylation; in vitro studies; in vivo studies; liquid-liquid extraction; liver microsomes; metabolic studies; metabolism; metabolites; monitoring; olefin; oral administration; racehorses; sports; stereoisomers; steroids; testosterone; urine
Abstract:: ... Oxyguno (4-chloro-17α-methyl-17β-hydroxy-androst-4-ene-3,11-dione) is a synthetic oral anabolic androgenic steroid commercially available without a prescription. Manufacturers of oxyguno claim that its anabolic effect in metabolic enhancement exceeds that of the classic anabolic steroid testosterone by seven times, but its androgenic side-effects are only twelve percent of testosterone. Like other ...
DOI:: 10.1016/j.aca.2015.08.006
: https://doi.org/10.1016/j.aca.2015.08.006

51. Monitoring of phthalates in foodstuffs using gas purge microsyringe extraction coupled with GC–MS

Author:: Miao He; Cui Yang; Renjie Geng; Xiangai Zhao; Lian Hong; Xiangfan Piao; Tie Chen; Maurizio Quinto; Donghao Li
Source:: Analytica chimica acta 2015 v.879 pp. 63-68
ISSN:: 0003-2670
Subject:: adults; analytical chemistry; diet; endocrine-disrupting chemicals; gas chromatography-mass spectrometry; humans; monitoring; phthalates; plasticizers; seafoods; vinyl plastics
Abstract:: ... Phthalate esters (PAEs) are commonly used as nonreactive plasticisers in vinyl plastics to increase the flexibility of plastic polymers. Numerous studies have indicated that the PAEs as a class of endocrine-disrupting chemicals. In addition, the studies have also shown that a major source of human exposure to phthalates is the diet. To date, the largest problem in PAEs analysis is the high blank v ...
DOI:: 10.1016/j.aca.2015.02.066
: https://doi.org/10.1016/j.aca.2015.02.066

52. Monodisperse microporous carbon nanospheres: An efficient and stable solid phase microextraction coating material

Author:: Juan Zheng; Kun Wang; Erlun Luo; Dingcai Wu; Fang Zhu; Ruifen Jiang; Chengyong Su; Chaohai Wei; Gangfeng Ouyang
Source:: Analytica chimica acta 2015 v.884 pp. 44-51
ISSN:: 0003-2670
Subject:: analytical chemistry; carbon; coatings; detection limit; durability; gas chromatography-mass spectrometry; nanospheres; organochlorine pesticides; polycyclic aromatic hydrocarbons; polystyrenes; porous media; river water; rivers; solid phase microextraction; spectrometers; thermal stability; wastewater
Abstract:: ... The monodisperse microporous carbon nanospheres (MMCNSs) were applied in solid phase microextraction for the first time. The MMCNSs-fiber was prepared by sol–gel technique and good repeatability and reproducibility were obtained, due to the excellent monodispersity of the MMCNSs. The sol–gel-MMCNSs fiber exhibited superior extraction ability for polycyclic aromatic hydrocarbons (PAHs) and organoch ...
DOI:: 10.1016/j.aca.2015.05.017
: https://doi.org/10.1016/j.aca.2015.05.017

53. Novel application of liquid chromatography/mass spectrometry for the characterization of drying oils in art: Elucidation on the composition of original paint materials used by Edvard Munch (1863–1944)

Author:: Jacopo La Nasa; Marco Zanaboni; Daniele Uldanck; Ilaria Degano; Francesca Modugno; Hartmut Kutzke; Eva Storevik Tveit; Biljana Topalova-Casadiego; Maria Perla Colombini
Source:: Analytica chimica acta 2015 v.896 pp. 177-189
ISSN:: 0003-2670
Subject:: additives; analytical chemistry; derivatization; drying oils; fatty acid composition; gas chromatography-mass spectrometry; hydrolysis; ingredients; liquid chromatography; paints; screening; triacylglycerols
Abstract:: ... Modern oil paints, introduced at the beginning of the 20th century, differ from those classically used in antiquity in their chemical and compositional features. The main ingredients were still traditional drying oils, often used in mixtures with less expensive oils and added with several classes of additives. Consequently, detailed lipid profiling, together with the study of lipid degradation pro ...
DOI:: 10.1016/j.aca.2015.09.023
: https://doi.org/10.1016/j.aca.2015.09.023

54. Occurrence of oleic and 18:1 methyl-branched acyl chains in lipids of Rhodobacter sphaeroides 2.4.1

Author:: Sara Granafei; Ilario Losito; Simona Salivo; Peter Q. Tranchida; Luigi Mondello; Francesco Palmisano; Tommaso R.I. Cataldi
Source:: Analytica chimica acta 2015 v.885 pp. 191-198
ISSN:: 0003-2670
Subject:: Rhodobacter sphaeroides; analytical chemistry; biochemical pathways; biosynthesis; cis-trans isomers; databases; fatty acid methyl esters; fatty acids; gas chromatography-mass spectrometry; genes; ionic liquids; lipid composition
Abstract:: ... The fatty acids (FAs) composition of lipids extracted from Rhodobacter sphaeroides 2.4.1 was investigated by gas chromatography–mass spectrometry (GC–MS) analysis of the corresponding FA methyl esters (FAMEs), obtained through trans-esterification of the original lipid species. A GC stationary phase based on a highly polar ionic liquid (IL) was selected, aimed to enhance the separation of isomeric ...
DOI:: 10.1016/j.aca.2015.05.028
: https://doi.org/10.1016/j.aca.2015.05.028

55. On-line monitoring of Soxhlet extraction by chromatography and mass spectrometry to reveal temporal extract profiles

Author:: Ssu-Ying Chen; Pawel L. Urban
Source:: Analytica chimica acta 2015 v.881 pp. 74-81
ISSN:: 0003-2670
Subject:: chemical analysis; electrospray ionization mass spectrometry; equations; foods; gas chromatography-mass spectrometry; kinetics; lemons; limonene; mass transfer; models; monitoring; plant tissues; solid phase extraction
Abstract:: ... Soxhlet extraction is a popular sample preparation technique used in chemical analysis. It enables liberation of molecules embedded in complex matrices (for example, plant tissues, foodstuffs). In most protocols, samples are analyzed after the extraction process is complete. However, in order to optimize extraction conditions and enable comparisons between different types of extraction, it would b ...
DOI:: 10.1016/j.aca.2015.05.003
: https://doi.org/10.1016/j.aca.2015.05.003

56. Optimal design of experiments applied to headspace solid phase microextraction for the quantification of vicinal diketones in beer through gas chromatography-mass spectrometric detection

Author:: João M. Leça; Ana C. Pereira; Ana C. Vieira; Marco S. Reis; José C. Marques
Source:: Analytica chimica acta 2015 v.887 pp. 101-110
ISSN:: 0003-2670
Subject:: agitation; beers; diacetyl; experimental design; gas chromatography-mass spectrometry; headspace analysis; monitoring; odors; off flavors; solid phase microextraction
Abstract:: ... Vicinal diketones, namely diacetyl (DC) and pentanedione (PN), are compounds naturally found in beer that play a key role in the definition of its aroma. In lager beer, they are responsible for off-flavors (buttery flavor) and therefore their presence and quantification is of paramount importance to beer producers. Aiming at developing an accurate quantitative monitoring scheme to follow these off ...
DOI:: 10.1016/j.aca.2015.06.044
: https://doi.org/10.1016/j.aca.2015.06.044

57. Polybutylene terephthalate-nickel oxide nanocomposite as a fiber coating

Author:: Habib Bagheri; Ali Roostaie
Source:: Analytica chimica acta 2015 v.863 pp. 20-28
ISSN:: 0003-2670
Subject:: coatings; correlation; desorption; detection limit; gas chromatography-mass spectrometry; headspace analysis; monitoring; nanocomposites; nanofibers; nanoparticles; nickel; solid phase microextraction; volatile organic compounds
Abstract:: ... A highly efficient polybutylene terephthalate (PBT)-based nanocomposite containing nickel oxide nanoparticles was synthesized by electrospinning technique and used as a fiber coating for solid phase microextraction. The influential morphological parameters and capability of the prepared nanocomposite including the NiO content, the coating time, the PBT concentration and applied voltage were consid ...
DOI:: 10.1016/j.aca.2015.01.025
: https://doi.org/10.1016/j.aca.2015.01.025

58. Preparation and characterization of metal-organic framework MIL-101(Cr)-coated solid-phase microextraction fiber

Author:: Lijun Xie; Shuqin Liu; Zhubing Han; Ruifen Jiang; Hong Liu; Fang Zhu; Feng Zeng; Chengyong Su; Gangfeng Ouyang
Source:: Analytica chimica acta 2015 v.853 pp. 303-310
ISSN:: 0003-2670
Subject:: BTEX (benzene, toluene, ethylbenzene, xylene); adsorbents; benzene; chromium; coordination polymers; desorption; detection limit; ethylbenzene; gas chromatography-mass spectrometry; headspace analysis; polycyclic aromatic hydrocarbons; river water; solid phase microextraction; thermal stability; toluene; volatile compounds; xylene
Abstract:: ... Metal-organic frameworks (MOFs) have received great attention as novel sorbents due to their fascinating structures and intriguing potential applications in various fields. In this work, a MIL-101(Cr)-coated solid-phase microextraction (SPME) fiber was fabricated by a simple direct coating method and applied to the determination of volatile compounds (BTEX, benzene, toluene, ethylbenzene, m-xylene ...
DOI:: 10.1016/j.aca.2014.09.048
: https://doi.org/10.1016/j.aca.2014.09.048

59. Preparation of C18 composite solid-phase microextraction fiber and its application to the determination of organochlorine pesticides in water samples

Author:: Siyan Li; Chengwei Lu; Fang Zhu; Ruifen Jiang; Gangfeng Ouyang
Source:: Analytica chimica acta 2015 v.873 pp. 57-62
ISSN:: 0003-2670
Subject:: DDT (pesticide); analytical chemistry; cis-chlordane; coatings; gas chromatography-mass spectrometry; mirex; silicone; solid phase microextraction; solvents; stainless steel; thermal stability; trans-chlordane
Abstract:: ... In this work, a C18 composite solid-phase microextraction (SPME) fiber was prepared with a new method and applied to the analysis of organochlorine pesticides (OCPs) in water sample. A stainless steel wire (o.d. 127μm) was used as the substrate, and a mixture of the C18 particle (3.5μm) and the 184 silicone was used as the coating material. During the process of fiber preparation, a section of cap ...
DOI:: 10.1016/j.aca.2015.03.031
: https://doi.org/10.1016/j.aca.2015.03.031

60. Quantification of benzene, toluene, ethylbenzene and o-xylene in internal combustion engine exhaust with time-weighted average solid phase microextraction and gas chromatography mass spectrometry

Author:: Nassiba Baimatova; Jacek A. Koziel; Bulat Kenessov
Source:: Analytica chimica acta 2015 v.873 pp. 38-50
ISSN:: 0003-2670
Subject:: BTEX (benzene, toluene, ethylbenzene, xylene); analytical chemistry; benzene; coatings; combustion; detection limit; developing countries; ethylbenzene; gas chromatography-mass spectrometry; models; solid phase microextraction; storage time; time-weighted average; toluene; xylene
Abstract:: ... A new and simple method for benzene, toluene, ethylbenzene and o-xylene (BTEX) quantification in vehicle exhaust was developed based on diffusion-controlled extraction onto a retracted solid-phase microextraction (SPME) fiber coating. The rationale was to develop a method based on existing and proven SPME technology that is feasible for field adaptation in developing countries. Passive sampling wi ...
DOI:: 10.1016/j.aca.2015.02.062
: https://doi.org/10.1016/j.aca.2015.02.062

61. Review of recent developments and applications in low-pressure (vacuum outlet) gas chromatography

Author:: Yelena Sapozhnikova; Steven J. Lehotay
Source:: Analytica chimica acta 2015 v.899 pp. 13-22
ISSN:: 0003-2670
Subject:: analytical chemistry; detection limit; detectors; explosives; gas chromatography-mass spectrometry; pesticides; phytosterols; pollution; viscosity
Abstract:: ... The concept of low pressure (LP) vacuum outlet gas chromatography (GC) was introduced more than 50 years ago, but it was not until the 2000s that its theoretical applicability to fast analysis of GC-amenable chemicals was realized. In practice, LPGC is implemented by placing the outlet of a short, wide (typically 10–15 m, 0.53 mm inner diameter) analytical column under vacuum conditions, which spe ...
DOI:: 10.1016/j.aca.2015.10.003
: https://doi.org/10.1016/j.aca.2015.10.003

62. Simple spectrophotometry method for the determination of sulfur dioxide in an alcohol-thionyl chloride reaction

Author:: Jinjian Zheng; Feng Tan; Robert Hartman
Source:: Analytica chimica acta 2015 v.891 pp. 255-260
ISSN:: 0003-2670
Subject:: absorbance; acetic acid; ammonium acetate; analytical chemistry; atomic absorption spectrometry; byproducts; gas chromatography-mass spectrometry; hydrochloric acid; methanol; monitoring; mutagenicity; nitrogen; pH; sulfur dioxide
Abstract:: ... Thionyl chloride is often used to convert alcohols into more reactive alkyl chloride, which can be easily converted to many compounds that are not possible from alcohols directly. One important reaction of alkyl chloride is nucleophilic substitution, which is typically conducted under basic conditions. Sulfur dioxide, the by-product from alcohol-thionyl chloride reactions, often reacts with alkyl ...
DOI:: 10.1016/j.aca.2015.05.043
: https://doi.org/10.1016/j.aca.2015.05.043

63. Sol–gel-based silver nanoparticles-doped silica – Polydiphenylamine nanocomposite for micro-solid-phase extraction

Author:: Habib Bagheri; Solmaz Banihashemi
Source:: Analytica chimica acta 2015 v.886 pp. 56-65
ISSN:: 0003-2670
Subject:: adsorption; analytical chemistry; desorption; detection limit; gas chromatography-mass spectrometry; methanol; monitoring; nanocomposites; nanosilver; pH; pesticides; propionic acid; salting; scanning electron microscopy; silica; silver; sol-gel processing; solvents; statistical analysis
Abstract:: ... A nanocomposite of silica-polydiphenylamine doped with silver nanoparticles (Ag–SiO2-PDPA) was successfully synthesized by the sol–gel process. For its preparation, PDPA was mixed with butanethiol capped Ag nanoparticles (NPs) and added to the silica sol solution. The Ag NPs were stabilized as a result of their adsorption on the SiO2 spheres. The surface characteristic of nanocomposite was investi ...
DOI:: 10.1016/j.aca.2015.06.012
: https://doi.org/10.1016/j.aca.2015.06.012

64. Bacteria detection based on the evolution of enzyme-generated volatile organic compounds: Determination of Listeria monocytogenes in milk samples

Author:: Emma Tait; John D. Perry; Stephen P. Stanforth; John R. Dean
Source:: Analytica chimica acta 2014 v.848 pp. 80-87
ISSN:: 0003-2670
Subject:: Listeria monocytogenes; acriflavine; bacteria; beta-glucosidase; culture media; cycloheximide; enzyme substrates; food contamination; foodborne illness; gas chromatography-mass spectrometry; headspace analysis; humans; hydrochloric acid; microbial detection; milk; nalidixic acid; rapid methods; solid phase microextraction; volatile organic compounds
Abstract:: ... The rapid detection of Listeria monocytogenes contamination in food is essential to prevent food-borne illness in humans. The aim of this study was to differentiate non-contaminated milk from milk contaminated with L. monocytogenes using enzyme substrates coupled with the analysis of volatile organic compounds (VOCs). The method is based on the activity of β-glucosidase and hippuricase enzymes and ...
DOI:: 10.1016/j.aca.2014.07.029
: https://doi.org/10.1016/j.aca.2014.07.029

65. Cobalt oxide nanoparticles as a novel high-efficiency fiber coating for solid phase microextraction of benzene, toluene, ethylbenzene and xylene from aqueous solutions

Author:: Mohammad Bagher Gholivand; Mojtaba Shamsipur; Mohammad Shamizadeh; Rostam Moradian; Bandar Astinchap
Source:: Analytica chimica acta 2014 v.822 pp. 30-36
ISSN:: 0003-2670
Subject:: BTEX (benzene, toluene, ethylbenzene, xylene); X-ray diffraction; analytical chemistry; aqueous solutions; benzene; coatings; cobalt; ethylbenzene; gas chromatography-mass spectrometry; nanoparticles; scanning electron microscopy; solid phase microextraction; statistical analysis; system optimization; toluene; xylene
Abstract:: ... In this work cobalt oxide nanoparticles were introduced for preparation of a novel solid phase microextraction (SPME) fiber coating. Chemical bath deposition (CBD) technique was used in order for synthesis and immobilization of the Co3O4 nanomaterials on a Pt wire for fabrication of SPME fiber. The prepared cobalt oxide coating was characterized by scanning electron microscopy (SEM) and X-ray diff ...
DOI:: 10.1016/j.aca.2014.02.032
: https://doi.org/10.1016/j.aca.2014.02.032

66. Determination of UV filters in both soluble and particulate fractions of seawaters by dispersive liquid–liquid microextraction followed by gas chromatography–mass spectrometry

Author:: J.L. Benedé; A. Chisvert; A. Salvador; D. Sánchez-Quiles; A. Tovar-Sánchez
Source:: Analytica chimica acta 2014 v.812 pp. 50-58
ISSN:: 0003-2670
Subject:: UV filters; analytical chemistry; detection limit; gas chromatography-mass spectrometry; ionic strength; liquid-phase microextraction; pH; seawater; solvents; ultrasonic treatment
Abstract:: ... An analytical method to determine the total content (i.e., not only in the soluble fraction but also in the particulate one) of eight commonly used UV filters in seawater samples is presented for the first time. Dispersive liquid–liquid microextraction (DLLME) is used as microextraction technique to pre-concentrate the target analytes before their determination by gas chromatography–mass spectrome ...
DOI:: 10.1016/j.aca.2013.12.033
: https://doi.org/10.1016/j.aca.2013.12.033

67. Determination of atranol and chloroatranol in perfumes using simultaneous derivatization and dispersive liquid–liquid microextraction followed by gas chromatography–mass spectrometry

Author:: Marina López-Nogueroles; Alberto Chisvert; Amparo Salvador
Source:: Analytica chimica acta 2014 v.826 pp. 28-34
ISSN:: 0003-2670
Subject:: acetic anhydride; acetone; acetylation; allergenicity; analytical chemistry; chloroform; derivatization; detection limit; essential oils; gas chromatography-mass spectrometry; ionic strength; liquid-phase microextraction; perfumes; solutes; solvents
Abstract:: ... A new analytical method based on simultaneous derivatization and dispersive liquid–liquid microextraction (DLLME) followed by gas chromatography–mass spectrometry (GC–MS), for the determination of the allergenic compounds atranol and chloroatranol in perfumes, is presented. Derivatization of the target analytes by means of acetylation with anhydride acetic in carbonate buffer was carried out. Ther ...
DOI:: 10.1016/j.aca.2014.03.042
: https://doi.org/10.1016/j.aca.2014.03.042

68. Development of solid-phase microextraction to study dissolved organic matter—Polycyclic aromatic hydrocarbon interactions in aquatic environment

Author:: Chloé de Perre; Karyn Le Ménach; Fabienne Ibalot; Edith Parlanti; Hélène Budzinski
Source:: Analytica chimica acta 2014 v.807 pp. 51-60
ISSN:: 0003-2670
Subject:: analytical chemistry; aquatic environment; dissolved organic carbon; fluorescence; gas chromatography-mass spectrometry; humic acids; molecular weight; naphthalene; polycyclic aromatic hydrocarbons; solid phase microextraction; water distribution
Abstract:: ... Solid-phase microextraction coupled with gas chromatography and mass spectrometry (SPME–GC–MS) was developed for the study of interactions between polycyclic aromatic hydrocarbons (PAHs) and dissolved organic matter (DOM). After the determination of the best conditions of extraction, the tool was applied to spiked water to calculate the dissolved organic carbon water distribution coefficient (KDOC ...
DOI:: 10.1016/j.aca.2013.11.026
: https://doi.org/10.1016/j.aca.2013.11.026

69. Experimental validation of an effective carbon number-based approach for the gas chromatography–mass spectrometry quantification of ‘compounds lacking authentic standards or surrogates’

Author:: Yong-Hyun Kim; Ki-Hyun Kim; Jan E. Szulejko; Min-Suk Bae; Richard J.C. Brown
Source:: Analytica chimica acta 2014 v.830 pp. 32-41
ISSN:: 0003-2670
Subject:: analytical chemistry; aromatic compounds; carbon; desorption; equations; gas chromatography-mass spectrometry; laboratory experimentation; prediction; quantitative analysis; volatile organic compounds
Abstract:: ... For the quantitative analysis of ‘compounds lacking authentic standards or surrogates’ (CLASS) in environmental media, we previously introduced an effective carbon number (ECN) approach to develop an empirical equation for the prediction of their response factor (RF). In this research, a series of laboratory experiments were carried out to benchmark the reliability of an ECN approach for sorbent t ...
DOI:: 10.1016/j.aca.2014.04.052
: https://doi.org/10.1016/j.aca.2014.04.052

70. Exploring metabolic syndrome serum profiling based on gas chromatography mass spectrometry and random forest models

Author:: Zhang Lin; Carlos M. Vicente Gonçalves; Ling Dai; Hong-mei Lu; Jian-hua Huang; Hongchao Ji; Dong-sheng Wang; Lun-zhao Yi; Yi-zeng Liang
Source:: Analytica chimica acta 2014 v.827 pp. 22-27
ISSN:: 0003-2670
Subject:: analytical chemistry; biomarkers; blood glucose; blood serum; cholesterol; diabetes; early diagnosis; fasting; gas chromatography-mass spectrometry; glucose; hypertension; inositols; metabolic syndrome; metabolites; metabolomics; models; myocardial infarction; obesity; patients; risk factors
Abstract:: ... Metabolic syndrome (MetS) is a constellation of the most dangerous heart attack risk factors: diabetes and raised fasting plasma glucose, abdominal obesity, high cholesterol and high blood pressure. Analysis and representation of the variances of metabolic profiles is urgently needed for early diagnosis and treatment of MetS. In current study, we proposed a metabolomics approach for analyzing MetS ...
DOI:: 10.1016/j.aca.2014.04.008
: https://doi.org/10.1016/j.aca.2014.04.008

71. Gas chromatographic retention index as a basis for predicting evaporation rates of complex mixtures

Author:: John W. Mcllroy; A. Daniel Jones; Victoria L. McGuffin
Source:: Analytica chimica acta 2014 v.852 pp. 257-266
ISSN:: 0003-2670
Subject:: alkanes; analytical chemistry; benzene; evaporation rate; gas chromatography-mass spectrometry; models; petroleum; polycyclic compounds; prediction; remediation; temporal variation
Abstract:: ... Models that predict the fate of petroleum fuels in the environment are often required for effective remediation of fuel-contaminated sites. In this research, an environmental fuel spill was simulated by means of a diesel/water microcosm, in which the temporal changes in composition were assessed during evaporation by gas chromatography–mass spectrometry (GC–MS). First-order kinetic rate constants ...
DOI:: 10.1016/j.aca.2014.08.055
: https://doi.org/10.1016/j.aca.2014.08.055

72. Gas chromatography–mass spectroscopy optimization by computer simulation, application to the analysis of 93 volatile organic compounds in workplace ambient air

Author:: J. Randon; L. Maret; C. Ferronato
Source:: Analytica chimica acta 2014 v.812 pp. 258-264
ISSN:: 0003-2670
Subject:: air; analytical chemistry; computer simulation; databases; gas chromatography-mass spectrometry; ions; system optimization; temperature; thermodynamics; volatile organic compounds; working conditions
Abstract:: ... GC–MS optimization method including both advantages from chromatographic separation and mass spectrometric detection was designed for a set of 93 volatile organic compounds. Only a few experiments were necessary to determine the thermodynamic retention parameters for all compounds on a RTX-VMS column. From these data, computer simulation was used in order to predict the retention times of the comp ...
DOI:: 10.1016/j.aca.2014.01.016
: https://doi.org/10.1016/j.aca.2014.01.016

73. Insitu growth of IRMOF-3 combined with ionic liquids to prepare solid-phase microextraction fibers

Author:: Juan Zheng; Siyan Li; Ying Wang; Lei Li; Chengyong Su; Hong Liu; Fang Zhu; Ruifen Jiang; Gangfeng Ouyang
Source:: Analytica chimica acta 2014 v.829 pp. 22-27
ISSN:: 0003-2670
Subject:: analytical chemistry; coatings; cracking; detection limit; gas chromatography-mass spectrometry; humidity; ionic liquids; longevity; polycyclic aromatic hydrocarbons; rain; solid phase microextraction; stainless steel; synthetic fibers; temperature
Abstract:: ... A superior solid-phase microextraction (SPME) fiber-coating material, IRMOF-3@ILs/PDMS, was prepared by the in situ growth of IRMOF-3 onto stainless-steel wires and protection with ionic liquids (ILs) and polydimethylsiloxane (PDMS). The ILs can efficiently prevent the substantial cracking of IRMOF-3 caused by moisture, and a thin PDMS film can protect the IRMOF-3@ILs material to achieve a much be ...
DOI:: 10.1016/j.aca.2014.04.039
: https://doi.org/10.1016/j.aca.2014.04.039

74. Multi-response optimization of the extraction and derivatization protocol of selected polar metabolites from apple fruit tissue for GC–MS analysis

Author:: Elias A. Bekele; Carlo E.P. Annaratone; Maarten L.A.T.M. Hertog; Bart M. Nicolai; Annemie H. Geeraerd
Source:: Analytica chimica acta 2014 v.824 pp. 42-56
ISSN:: 0003-2670
Subject:: analytical chemistry; apples; chloroform; derivatization; gas chromatography-mass spectrometry; metabolites; metabolome; methanol; physicochemical properties; temperature
Abstract:: ... Given the complexity of the plant metabolome exhibiting a wide spectrum of physico-chemical properties, finding the best compromise for GC–MS analysis is a challenging exercise. In this study, the GC–MS protocol for extracting and analyzing polar metabolites from apple tissue is optimized. We found pure methanol extraction to be slightly better as compared to the two phase methanol/chloroform/wate ...
DOI:: 10.1016/j.aca.2014.03.030
: https://doi.org/10.1016/j.aca.2014.03.030

75. NMR investigation of acrolein stability in hydroalcoholic solution as a foundation for the valid HS-SPME/GC–MS quantification of the unsaturated aldehyde in beverages

Author:: Martin Kächele; Yulia B. Monakhova; Thomas Kuballa; Dirk W. Lachenmeier
Source:: Analytica chimica acta 2014 v.820 pp. 112-118
ISSN:: 0003-2670
Subject:: Artemisia absinthium; World Health Organization; acrolein; beers; bottled water; cytotoxicity; detection limit; gas chromatography-mass spectrometry; grape pomace; headspace analysis; health hazards; humans; hydroquinone; nuclear magnetic resonance spectroscopy; quantitative analysis; solid phase microextraction; vodka; whisky; wines
Abstract:: ... Acrolein (propenal) is found in many foods and beverages and may pose a health hazard due to its cytotoxicity. Considerable knowledge gaps regarding human exposure to acrolein exist, and there is a lack of reliable analytical methods. Hydroalcoholic dilutions prepared for calibration purposes from pure acrolein show considerable degradation of the compound and nuclear magnetic resonance (NMR) spec ...
DOI:: 10.1016/j.aca.2014.02.030
: https://doi.org/10.1016/j.aca.2014.02.030

76. Preparation, characterization, and applications of a novel solid-phase microextraction fiber by sol-gel technology on the surface of stainless steel wire for determination of poly cyclic aromatic hydrocarbons in aquatic environmental samples

Author:: Ali Es-haghi; Valiallah Hosseininasab; Habib Bagheri
Source:: Analytica chimica acta 2014 v.813 pp. 48-55
ISSN:: 0003-2670
Subject:: coatings; desorption; detection limit; energy-dispersive X-ray analysis; gas chromatography-mass spectrometry; headspace analysis; ionic strength; nanoparticles; polycyclic aromatic hydrocarbons; scanning electron microscopy; solid phase microextraction; stainless steel; temperature; thermal stability
Abstract:: ... A novel solid-phase microextraction(SPME) fiber was prepared using sol–gel technology with ethoxylated nonylphenol as a fiber coating material. The fiber was employed to develop a headspace SPME–GC–MS method suitable for quantification of 13 polycyclic aromatic hydrocarbons (PAHs) in water samples. Surface characteristics of the fibers were inspected by energy dispersive X-ray (EDX) spectroscopy a ...
DOI:: 10.1016/j.aca.2014.01.005
: https://doi.org/10.1016/j.aca.2014.01.005

77. Quantitative solid phase microextraction – Gas chromatography mass spectrometry analysis of five megastigmatrienone isomers in aged wine

Author:: Davide Slaghenaufi; Marie-Claire Perello; Stéphanie Marchand-Marion; Sophie Tempere; Gilles de Revel
Source:: Analytica chimica acta 2014 v.813 pp. 63-69
ISSN:: 0003-2670
Subject:: adsorption; flavor; gas chromatography-mass spectrometry; headspace analysis; isomers; monitoring; odors; red wines; solid phase microextraction; temperature; tobacco; white wines; wine aging
Abstract:: ... Megastigmatrienone is a key flavor compound in tobacco. It has also been detected in wine, where it may contribute to a tobacco/incense aroma, but its importance and concentration in wines had never previously been evaluated.A method was developed and validated for quantifying the five megastigmatrienone isomers in red and white wines.Megastigmatrienone isomers were extracted by headspace solid-ph ...
DOI:: 10.1016/j.aca.2014.01.019
: https://doi.org/10.1016/j.aca.2014.01.019

78. Rapid and sensitive methodology for determination of ethyl carbamate in fortified wines using microextraction by packed sorbent and gas chromatography with mass spectrometric detection

Author:: João M. Leça; Vanda Pereira; Ana C. Pereira; José C. Marques
Source:: Analytica chimica acta 2014 v.811 pp. 29-35
ISSN:: 0003-2670
Subject:: analytical chemistry; detection limit; equipment; ethyl carbamate; experimental design; fortified wines; gas chromatography-mass spectrometry; methylene chloride; microextraction; solvents
Abstract:: ... This work presents a new methodology to quantify ethyl carbamate (EC) in fortified wines. The presented approach combines the microextraction by packed sorbent (MEPS), using a hand-held automated analytical syringe, with one-dimensional gas chromatography coupled with mass spectrometry detection (GC–MS). The performance of different MEPS sorbent materials was tested, namely SIL, C2, C8, C18, and M ...
DOI:: 10.1016/j.aca.2013.12.018
: https://doi.org/10.1016/j.aca.2013.12.018

79. Re-evaluation of effective carbon number (ECN) approach to predict response factors of ‘compounds lacking authentic standards or surrogates’ (CLASS) by thermal desorption analysis with GC–MS

Author:: Jan E. Szulejko; Ki-Hyun Kim
Source:: Analytica chimica acta 2014 v.851 pp. 14-22
ISSN:: 0003-2670
Subject:: acetic acid; analytical chemistry; aromatic compounds; bromine; carbon; desorption; gas chromatography-mass spectrometry; learning; prediction; regression analysis
Abstract:: ... In our recent study, we experimentally demonstrated the feasibility of an effective carbon number (ECN) approach for the prediction of the response factor (RF) values of ‘compounds lacking authentic standards or surrogates’ (CLASS) using a certified 54-mix containing 38 halogenated analytes as a pseudo-unknown. Although our recent analysis performed well in terms of RF predictive power for a 25-co ...
DOI:: 10.1016/j.aca.2014.08.033
: https://doi.org/10.1016/j.aca.2014.08.033

80. Sensitive determination of fluoride in biological samples by gas chromatography–mass spectrometry after derivatization with 2-(bromomethyl)naphthalene

Author:: Sun-Myung Kwon; Ho-Sang Shin
Source:: Analytica chimica acta 2014 v.852 pp. 162-167
ISSN:: 0003-2670
Subject:: analytical chemistry; catalysts; derivatization; detection limit; fluorides; gas chromatography-mass spectrometry; heat; methylene chloride; mineral water; naphthalene; pH; temperature; urine
Abstract:: ... A gas chromatography–mass spectrometric method was developed in this study in order to determine fluoride in plasma and urine after derivatization with 2-(bromomethyl)naphthalene. 2-Fluoronaphthalene was chosen as the internal standard. The derivatization of fluoride was performed in the biological sample and the best reaction conditions (10.0mgmL−1 of 2-(bromomethyl)naphthalene, 1.0mgmL−1 of 15-c ...
DOI:: 10.1016/j.aca.2014.09.035
: https://doi.org/10.1016/j.aca.2014.09.035

81. A derivative photoelectrochemical sensing platform for 4-nitrophenolate contained organophosphates pesticide based on carboxylated perylene sensitized nano-TiO₂

Author:: Hongbo Li; Jing Li; Qin Xu; Zhanjun Yang; Xiaoya Hu
Source:: Analytica chimica acta 2013 v.766 no. pp. 47-52
ISSN:: 0003-2670
Subject:: Fourier transform infrared spectroscopy; X-radiation; coatings; detection limit; gas chromatography-mass spectrometry; hydrolysates; hydrolysis; models; neutralization; p-nitrophenol; parathion-methyl; scanning electron microscopy; titanium dioxide; transmission electron microscopes; vegetables
Abstract:: ... A novel visible light sensitized photoelectrochemical sensing platform was constructed based on the perylene-3,4,9,10-tetracarboxylic acid/titanium dioxide (PTCA/TiO₂) heterojunction as the photoelectric beacon. PTCA was synthesized via facile steps of hydrolysis and neutralization reaction, and then the PTCA/TiO₂ heterojunction was easily prepared by coating PTCA on nano-TiO₂ surface. The resulti ...
DOI:: 10.1016/j.aca.2012.12.038
: https://doi.org/10.1016/j.aca.2012.12.038

82. A needle trap device packed with a sol–gel derived, multi-walled carbon nanotubes/silica composite for sampling and analysis of volatile organohalogen compounds in air

Author:: Mahmoud Heidari; Abdolrahman Bahrami; Ali Reza Ghiasvand; Farshid Ghorbani Shahna; Ali Reza Soltanian
Source:: Analytica chimica acta 2013 v.785 pp. 67-74
ISSN:: 0003-2670
Subject:: air; carbon nanotubes; detection limit; gas chromatography-mass spectrometry; organic halogen compounds; pollutants; silica; solid phase microextraction
Abstract:: ... A needle trap device (NTD) packed with silica composite of multi-walled carbon nanotubes (MWCNTs) prepared based on sol–gel technique was utilized for sampling and analysis of volatile organohalogen compounds (HVOCs) in air. The performance of the NTD packed with MWCNTs/silica composite as sorbent was examined in a variety of sampling conditions and was compared with NTDs packed with PDMS as well ...
DOI:: 10.1016/j.aca.2013.04.057
: https://doi.org/10.1016/j.aca.2013.04.057

83. A new approach to untargeted integration of high resolution liquid chromatography–mass spectrometry data

Author:: Frans M. van der Kloet; Margriet Hendriks; Thomas Hankemeier; Theo Reijmers
Source:: Analytica chimica acta 2013 v.801 pp. 34-42
ISSN:: 0003-2670
Subject:: algorithms; computer software; gas chromatography-mass spectrometry; lipids; liquid chromatography; metabolites
Abstract:: ... Because of its high sensitivity and specificity, hyphenated mass spectrometry has become the predominant method to detect and quantify metabolites present in bio-samples relevant for all sorts of life science studies being executed. In contrast to targeted methods that are dedicated to specific features, global profiling acquisition methods allow new unspecific metabolites to be analyzed. The chal ...
DOI:: 10.1016/j.aca.2013.09.028
: https://doi.org/10.1016/j.aca.2013.09.028

84. A new method for the automated selection of the number of components for deconvolving overlapping chromatographic peaks

Author:: Sonja Peters; Hans-Gerd Janssen; Gabriel Vivó-Truyols
Source:: Analytica chimica acta 2013 v.799 pp. 29-35
ISSN:: 0003-2670
Subject:: automation; gas chromatography-mass spectrometry; models
Abstract:: ... Mathematical deconvolution methods can separate co-eluting peaks in samples for which (chromatographic) separation fail. However, these methods often heavily rely on manual user-input and interpretation. This is not only time-consuming but also error-prone and automation is needed if such methods are to be applied in a routine manner.One major hurdle when automating deconvolution methods is the se ...
DOI:: 10.1016/j.aca.2013.08.041
: https://doi.org/10.1016/j.aca.2013.08.041

85. A non-invasive method for in vivo skin volatile compounds sampling

Author:: Ruifen Jiang; Erasmus Cudjoe; Barbara Bojko; Tatjana Abaffy; Janusz Pawliszyn
Source:: Analytica chimica acta 2013 v.804 pp. 111-119
ISSN:: 0003-2670
Subject:: alcohol drinking; alcohols; biomarkers; body regions; dimethyl sulfide; disease diagnosis; dry ice; environmental factors; garlic; gas chromatography-mass spectrometry; headspace analysis; humans; metabolites; sebaceous glands; skin diseases; storage conditions; volatile organic compounds
Abstract:: ... The use of volatile organic compounds (VOCs) emanating from human skin presents great potential for skin disease diagnosis. These compounds are emitted at very low concentrations. Thus, the sampling preparation step needs to be implemented before gas chromatography–mass spectrometry (GC–MS) analysis. In this work, a simple, non-invasive headspace sampling method for volatile compounds emanating fr ...
DOI:: 10.1016/j.aca.2013.09.056
: https://doi.org/10.1016/j.aca.2013.09.056

86. Alkyd paints in art: Characterization using integrated mass spectrometry

Author:: Jacopo La Nasa; Ilaria Degano; Francesca Modugno; Maria Perla Colombini
Source:: Analytica chimica acta 2013 v.797 pp. 64-80
ISSN:: 0003-2670
Subject:: additives; alkyd resins; diacylglycerols; electrospray ionization mass spectrometry; fatty acids; flow injection analysis; gas chromatography-mass spectrometry; high performance liquid chromatography; hydrolysis; paints; planning; polymers; rapid methods; spectrometers; trademarks; triacylglycerols
Abstract:: ... Alkyd resins have been commonly used as binders in artist paints since the 1940s. The characterization of alkyds in samples from artworks can help to solve attribution and dating issues, investigate decay processes, and contribute to the planning of conservation strategies. Being able to assess the components of industrially formulated paint materials and to differentiate between different tradema ...
DOI:: 10.1016/j.aca.2013.08.021
: https://doi.org/10.1016/j.aca.2013.08.021

87. An absorbing microwave micro-solid-phase extraction device used in non-polar solvent microwave-assisted extraction for the determination of organophosphorus pesticides

Author:: Ziming Wang; Xin Zhao; Xu Xu; Lijie Wu; Rui Su; Yajing Zhao; Chengfei Jiang; Hanqi Zhang; Qiang Ma; Chunmei Lu; Deming Dong
Source:: Analytica chimica acta 2013 v.760 pp. 60-68
ISSN:: 0003-2670
Subject:: absorption; activated carbon; gas chromatography-mass spectrometry; hexane; irradiation; microwave treatment; organophosphorus pesticides; polypropylenes; solvents; vegetables
Abstract:: ... A single-step extraction-cleanup method, including microwave-assisted extraction (MAE) and micro-solid-phase extraction (μ-SPE), was developed for the extraction of ten organophosphorus pesticides in vegetable and fruit samples. Without adding any polar solvent, only one kind of non-polar solvent (hexane) was used as extraction solvent in the whole extraction step. Absorbing microwave μ-SPE device ...
DOI:: 10.1016/j.aca.2012.11.031
: https://doi.org/10.1016/j.aca.2012.11.031

88. Automated SPME–GC–MS monitoring of headspace metabolomic responses of E. coli to biologically active components extracted by the coating

Author:: S.M. Zakir Hossain; Barbara Bojko; Janusz Pawliszyn
Source:: Analytica chimica acta 2013 v.776 pp. 41-49
ISSN:: 0003-2670
Subject:: Escherichia coli; alcohols; alkanes; anti-infective agents; bacteria; coatings; drugs; esters; gas chromatography-mass spectrometry; headspace analysis; metabolites; metabolomics; minimum inhibitory concentration; monitoring; organic acids and salts; solid phase microextraction
Abstract:: ... Monitoring extracellular metabolites of bacteria is very useful for not only metabolomics research but also for assessment of the effects of various chemicals, including antimicrobial agents and drugs. Herein, we describe the automated headspace solid-phase microextraction (HS-SPME) method coupled with gas chromatography–mass spectrometry (GC–MS) for the qualitative as well as semi-quantitative de ...
DOI:: 10.1016/j.aca.2013.03.018
: https://doi.org/10.1016/j.aca.2013.03.018

89. Automated thermochemolysis reactor for detection of Bacillus anthracis endospores by gas chromatography–mass spectrometry

Author:: Dan Li; Anthony D. Rands; Scott C. Losee; Brian C. Holt; John R. Williams; Stephen A. Lammert; Richard A. Robison; H. Dennis Tolley; Milton L. Lee
Source:: Analytica chimica acta 2013 v.775 pp. 67-74
ISSN:: 0003-2670
Subject:: Bacillus anthracis; algorithms; biomarkers; endospores; gas chromatography-mass spectrometry; solid phase microextraction; sugars; temperature
Abstract:: ... An automated sample preparation system was developed and tested for the rapid detection of Bacillus anthracis endospores by gas chromatography–mass spectrometry (GC–MS) for eventual use in the field. This reactor is capable of automatically processing suspected bio-threat agents to release and derivatize unique chemical biomarkers by thermochemolysis (TCM). The system automatically controls the mo ...
DOI:: 10.1016/j.aca.2013.03.011
: https://doi.org/10.1016/j.aca.2013.03.011

90. Characterisation of capillary ionic liquid columns for gas chromatography–mass spectrometry analysis of fatty acid methyl esters

Author:: Annie Xu Zeng; Sung-Tong Chin; Yada Nolvachai; Chadin Kulsing; Leonard M. Sidisky; Philip J. Marriott
Source:: Analytica chimica acta 2013 v.803 pp. 166-173
ISSN:: 0003-2670
Subject:: carbon; commercialization; energy; fatty acid methyl esters; gas chromatography-mass spectrometry; ionic liquids; isomers; physicochemical properties; temperature
Abstract:: ... Due to their distinct chemical properties, the application of ionic liquid (IL) compounds as gas chromatography (GC) stationary phases offer unique GC separation especially in the analysis of geometric and positional fatty acid methyl ester (FAME) isomers. Elution behaviour of FAME on several commercialised IL capillary columns including phosphonium based SLB-IL59, SLB-IL60, SLB-IL61 and SLB-IL76 ...
DOI:: 10.1016/j.aca.2013.07.002
: https://doi.org/10.1016/j.aca.2013.07.002

91. Characterisation of the flavour profile from Graciano Vitis vinifera wine variety by a novel dual stir bar sorptive extraction methodology coupled to thermal desorption and gas chromatography–mass spectrometry

Author:: Maria Arbulu; M. Carmen Sampedro; Alicia Sanchez-Ortega; Alberto Gómez-Caballero; Nora Unceta; M. Aranzazu Goicolea; Ramón J. Barrio
Source:: Analytica chimica acta 2013 v.777 pp. 41-48
ISSN:: 0003-2670
Subject:: acidity; grapes; phenols; furans; nitrogen compounds; computer software; odors; metabolites; sulfur; lactones; longevity; norisoprenoids; acids; metabolome; Vitis vinifera; databases; aldehydes; gas chromatography-mass spectrometry; response surface methodology; flavor; red wines; pyrans; color; wine cultivars; desorption; Spain
Abstract:: ... The aim of this work was to develop a new analytical technique for the study of the organoleptic compounds (flavour profile) of the Graciano Vitis vinifera wine variety. The cv. Graciano is a singular variety of red grapes with its origins in La Rioja and Navarra (northern Spain). This variety transfers an intense red colour, aroma and high acidity to musts and provides greater longevity and, cons ...
DOI:: 10.1016/j.aca.2013.03.024
: https://doi.org/10.1016/j.aca.2013.03.024

92. Conversion to isothiocyanates via dithiocarbamates for the determination of aromatic primary amines by headspace-solid phase microextraction and gas chromatography

Author:: Archana Jain; Kishan Reddy-Noone; Aradhana K.K.V. Pillai; Krishna K. Verma
Source:: Analytica chimica acta 2013 v.801 pp. 48-58
ISSN:: 0003-2670
Subject:: aniline; carbon disulfide; color; correlation; detection limit; flame ionization; gas chromatography-mass spectrometry; headspace analysis; heat; heavy metals; ice cream; ionization; isothiocyanates; primary amines; soft drinks; solid phase microextraction; toxicity; zinc
Abstract:: ... A novel and highly selective method has been developed for the determination of aromatic primary amines by their conversion to dithiocarbamates by reaction with carbon disulphide, and then to isothiocyanates, which are volatile, by heating in the presence of a heavy metal ion. Zinc(II) was selected owing to its low toxicity and optimum yield of isothiocyanates. The latter were sampled by headspace ...
DOI:: 10.1016/j.aca.2013.09.046
: https://doi.org/10.1016/j.aca.2013.09.046

93. Cork as a new (green) coating for solid-phase microextraction: Determination of polycyclic aromatic hydrocarbons in water samples by gas chromatography–mass spectrometry

Author:: Adriana Neves Dias; Vanessa Simão; Josias Merib; Eduardo Carasek
Source:: Analytica chimica acta 2013 v.772 pp. 33-39
ISSN:: 0003-2670
Subject:: Fourier transform infrared spectroscopy; coatings; cork; gas chromatography-mass spectrometry; polycyclic aromatic hydrocarbons; river water; scanning electron microscopy; solid phase microextraction; temperature
Abstract:: ... A new fiber for solid-phase microextraction (SPME) was prepared employing cork as a coating. The morphology and composition of the cork fiber was evaluated by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR), respectively. The proposed fiber was used for the determination of polycyclic aromatic hydrocarbons (PAHs) in river water samples by gas chromatography–se ...
DOI:: 10.1016/j.aca.2013.02.021
: https://doi.org/10.1016/j.aca.2013.02.021

94. Detection and identification of drugs and toxicants in human body fluids by liquid chromatography–tandem mass spectrometry under data-dependent acquisition control and automated database search

Author:: Herbert Oberacher; Birthe Schubert; Kathrin Libiseller; Anna Schweissgut
Source:: Analytica chimica acta 2013 v.770 pp. 121-131
ISSN:: 0003-2670
Subject:: blood; databases; gas chromatography-mass spectrometry; humans; illicit drugs; liquid chromatography; metabolites; screening; solid phase extraction; spectral analysis; tandem mass spectrometry; toxic substances; urine
Abstract:: ... Systematic toxicological analysis (STA) is aimed at detecting and identifying all substances of toxicological relevance (i.e. drugs, drugs of abuse, poisons and/or their metabolites) in biological material. Particularly, gas chromatography–mass spectrometry (GC/MS) represents a competent and commonly applied screening and confirmation tool. Herein, we present an untargeted liquid chromatography–ta ...
DOI:: 10.1016/j.aca.2013.01.057
: https://doi.org/10.1016/j.aca.2013.01.057

95. Determination of aminopolycarboxylic acids in river water by solid-phase extraction on activated charcoal cartridges and gas chromatography with mass spectrometric detection. Method performance characteristics and estimation of the uncertainty

Author:: Juan.J. Jiménez
Source:: Analytica chimica acta 2013 v.770 pp. 94-102
ISSN:: 0003-2670
Subject:: EDTA (chelating agent); activated carbon; gas chromatography-mass spectrometry; ionic strength; iron; methanol; nitrilotriacetic acid; organic matter; river water; solid phase extraction; statistical analysis; uncertainty
Abstract:: ... A new sample preparation procedure to determine aminopolycarboxylic acids (ethylenediaminetetraacetic acid, EDTA, nitrilotriacetic acid, NTA, diethylenetriaminepentaacetic acid, DTPA, and cyclohexanediaminetetraacetic acid, CDTA) in river water is described. The procedure consists of the solid-phase extraction of the aminopolycaroxyllic acids on activated charcoal cartridges after increasing the i ...
DOI:: 10.1016/j.aca.2013.01.060
: https://doi.org/10.1016/j.aca.2013.01.060

96. Determination of hormones in milk by hollow fiber-based stirring extraction bar liquid–liquid microextraction gas chromatography mass spectrometry

Author:: Xu Xu; Fanghui Liang; Jiayuan Shi; Xin Zhao; Zhuang Liu; Lijie Wu; Ying Song; Hanqi Zhang; Ziming Wang
Source:: Analytica chimica acta 2013 v.790 pp. 39-46
ISSN:: 0003-2670
Subject:: acetates; desorption; detection limit; estriol; estrone; gas chromatography-mass spectrometry; ionic strength; liquid-phase microextraction; medroxyprogesterone; milk; milk analysis; mixing; progesterone; rapid methods; solvents
Abstract:: ... The hollow fiber-based stirring extraction bar liquid–liquid microextraction was applied to the extraction of hormones, including 17-α-ethinylestradiol, 17-α-estradiol, estriol, 17-β-estradiol, estrone, 17-α-hydroxyprogesterone, medroxyprogesterone, progesterone and norethisterone acetate, in milk. The present method has the advantages of both hollow fiber-liquid phase microextraction and stirring ...
DOI:: 10.1016/j.aca.2013.06.035
: https://doi.org/10.1016/j.aca.2013.06.035

97. Determination of polycyclic and nitro musks in environmental water samples by means of microextraction by packed sorbents coupled to large volume injection-gas chromatography–mass spectrometry analysis

Author:: J. Cavalheiro; A. Prieto; M. Monperrus; N. Etxebarria; O. Zuloaga
Source:: Analytica chimica acta 2013 v.773 pp. 68-75
ISSN:: 0003-2670
Subject:: adsorbents; brackish water; desorption; detection limit; estuaries; gas chromatography-mass spectrometry; microextraction; solvents; wastewater; wastewater treatment; France; Spain
Abstract:: ... In this work the development and validation of a new procedure for the simultaneous determination of 9 nitro and polycyclic musk compounds: musk ambrette (MA), musk ketone (MK), musk mosken (MM), celestolide (ADBI), phantolide (AHMI), tonalide (AHTN), traseolide (ATII), cashmeran (DPMI) and galaxolide (HHCB) in environmental water samples (estuarine and wastewater) using microextraction by packed ...
DOI:: 10.1016/j.aca.2013.02.036
: https://doi.org/10.1016/j.aca.2013.02.036

98. Determination of trace levels of acetamide, propanamide, and butyramide in surface and drinking water using gas chromatography–mass spectrometry after derivatization with 9-xanthydrol

Author:: Young-Hwan Cho; Ho-Sang Shin
Source:: Analytica chimica acta 2013 v.787 pp. 111-117
ISSN:: 0003-2670
Subject:: acrylamides; ambient temperature; derivatization; detection limit; drinking water; gas chromatography-mass spectrometry; hydrochloric acid
Abstract:: ... A sensitive gas chromatographic mass spectrometric (GC–MS) method has been established for the simultaneous determination of acetamide (AA), propanamide (PA), and butyramide (BA) in surface and drinking water based on derivatization with 9-xanthydrol. Deuterated acrylamide was chosen as the internal standard for analyzing the water sample. The derivatization of AA, PA, and BA was performed directl ...
DOI:: 10.1016/j.aca.2013.06.013
: https://doi.org/10.1016/j.aca.2013.06.013

99. High-throughput micro-solid phase extraction on 96-well plate using dodecyl methacrylate-ethylen glycol dimethacrylate monolithic copolymer

Author:: Habib Bagheri; Ali Es’haghi; Ali Es-haghi; Elham Mohammadkhani
Source:: Analytica chimica acta 2013 v.792 pp. 59-65
ISSN:: 0003-2670
Subject:: composite polymers; detection limit; ethylene glycol; gas chromatography-mass spectrometry; ionic strength; multiresidue analysis; pesticides; stainless steel; surface water
Abstract:: ... A novel high-throughput device based on 96-micro-solid phase extraction (96-μ-SPE) system was constructed for multiresidue determination of nine pesticides in aquatic samples. The extraction procedure was performed on a commercially available 96-well plate system. The extraction module consisted of 96 pieces of 1cm×3cm of cylindrically shaped stainless steel meshes. The prepared meshes were fixed ...
DOI:: 10.1016/j.aca.2013.07.020
: https://doi.org/10.1016/j.aca.2013.07.020

100. Highly sensitive and selective organophosphate screening in twelve commodities of fruits, vegetables and herbal medicines by dispersive liquid–liquid microextraction

Author:: Yee-Man Ho; Yeuk-Ki Tsoi; Kelvin Sze-Yin Leung
Source:: Analytica chimica acta 2013 v.775 pp. 58-66
ISSN:: 0003-2670
Subject:: Codex Alimentarius; chemistry; dried herbs; dried vegetables; food analysis; fruits; gas chromatography-mass spectrometry; herbal medicines; liquid-phase microextraction; models; organophosphorus pesticides; raw fruit; raw vegetables; screening; solvents; vegetables
Abstract:: ... The article describes a simple sample pretreatment procedure for the analysis of ten organophosphorus pesticides using dispersive liquid–liquid microextraction (DLLME) followed by gas chromatography–mass spectrometry (GC–MS) in three distinctively different types of matrices: fresh fruits, fresh vegetables and dried herbs. The method was carefully developed, focusing on the chemistry of various di ...
DOI:: 10.1016/j.aca.2013.02.043
: https://doi.org/10.1016/j.aca.2013.02.043

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1. Critical review of analytical methods for the determination of flame retardants in human matrices

2. The history of electron ionization in LC-MS, from the early days to modern technologies: A review

3. A comparison of fast and reactive pyrolysis with insitu derivatisation of fructose, inulin and Jerusalem artichoke (Helianthus tuberosus)

4. Determination of volatile fatty acids in digestate by solvent extraction with dimethyl carbonate and gas chromatography-mass spectrometry

5. A multi-analytical approach to better assess the keratan sulfate contamination in animal origin chondroitin sulfate

6. Accurate and sensitive determination of molar fractions of 13C-Labeled intracellular metabolites in cell cultures grown in the presence of isotopically-labeled glucose

7. Bayesian approach to peak deconvolution and library search for high resolution gas chromatography – Mass spectrometry

8. Determination of total cyanide in soil by isotope dilution GC/MS following pentafluorobenzyl derivatization

9. Development of a GC/MS method for the qualitative and quantitative analysis of mixtures of free fatty acids and metal soaps in paint samples

10. Development of a modified QuEChERS method for multi-class pesticide analysis in human hair by GC-MS and UPLC-MS/MS

11. Discrimination of bacteria by rapid sensing their metabolic volatiles using an aspiration-type ion mobility spectrometer (a-IMS) and gas chromatography-mass spectrometry GC-MS

12. Fabrication of a polymeric composite incorporating metal-organic framework nanosheets for solid-phase microextraction of polycyclic aromatic hydrocarbons from water samples

13. GC-MS based metabolomics of colon cancer cells using different extraction solvents

14. Identification of sink spots in two thermal desorption GC/MS systems for the analysis of polycyclic aromatic hydrocarbons

15. Inter-laboratory validation of a thin film microextraction technique for determination of pesticides in surface water samples

16. Magnetic headspace adsorptive extraction of chlorobenzenes prior to thermal desorption gas chromatography-mass spectrometry

17. Marker discovery in volatolomics based on systematic alignment of GC-MS signals: Application to food authentication

18. Quantification ethyl carbamate in wines using reaction-assisted-extraction with 9-xanthydrol and detection by heart-cutting multidimensional gas chromatography-mass spectrometry

19. Rapid determination of nitrate in vegetables by gas chromatography mass spectrometry

20. Use of chemical conversion for determination of nitrated aromatic hydrocarbons using femtosecond ionization mass spectrometry

21. A simple approach for the preparation of simazine molecularly imprinted nanofibers via self-polycondensation for selective solid-phase microextraction

22. A systematic study on the effect of noise and shift on multivariate figures of merit of second-order calibration algorithms

23. Analysis of odour compounds from scented consumer products using gas chromatography-mass spectrometry and gas chromatography-olfactometry

24. Analysis of the major chiral compounds of Artemisia herba-alba essential oils (EOs) using reconstructed vibrational circular dichroism (VCD) spectra: En route to a VCD chiral signature of EOs

25. Analytical methods for the determination of mixtures of bisphenols and derivatives in human and environmental exposure sources and biological fluids. A review

26. Combined untargeted and targeted fingerprinting with comprehensive two-dimensional chromatography for volatiles and ripening indicators in olive oil

27. Development of a method for enhancing metabolomics coverage of human sweat by gas chromatography–mass spectrometry in high resolution mode

28. Development of an indirect ELISA for the determination of ethyl carbamate in Chinese rice wine

29. Effective methylation of phosphonic acids related to chemical warfare agents mediated by trimethyloxonium tetrafluoroborate for their qualitative detection and identification by gas chromatography-mass spectrometry

30. Evaluation of gas chromatography – Electron ionization – Full scan high resolution Orbitrap mass spectrometry for pesticide residue analysis

31. Extension of the two-dimensional mass channel cluster plot method to fast separations utilizing low thermal mass gas chromatography with time-of-flight mass spectrometry

32. Gas chromatographic determination of perfluorocarboxylic acids in aqueous samples – A tutorial review

33. In situ hydrothermal growth of ZnO/g-C3N4 nanoflowers coated solid-phase microextraction fibers coupled with GC-MS for determination of pesticides residues

34. Layer-by-layer functionalized porous Zinc sulfide nanospheres-based solid-phase extraction combined with liquid chromatography time-of-flight/mass and gas chromatography-mass spectrometry for the specific enrichment and identification of alkaloids from Crinum asiaticum var. sinicum

35. One step derivatization with British Anti-Lewsite in combination with gas chromatography coupled to triple-quadrupole tandem mass spectrometry for the fast and selective analysis of inorganic arsenic in rice

36. Postprandial metabolomics: A pilot mass spectrometry and NMR study of the human plasma metabolome in response to a challenge meal

37. Potential of atmospheric pressure chemical ionization source in gas chromatography tandem mass spectrometry for the screening of urinary exogenous androgenic anabolic steroids

38. Toward automated chromatographic fingerprinting: A non-alignment approach to gas chromatography mass spectrometry data

39. A molecularly imprinted polymer as the sorptive phase immobilized in a rotating disk extraction device for the determination of diclofenac and mefenamic acid in wastewater

40. Analysis of chemical profiles of insect adhesion secretions by gas chromatography–mass spectrometry

41. DATINK pilot study: An effective methodology for ballpoint pen ink dating in questioned documents

42. Determination of 13 endocrine disrupting chemicals in sediments by gas chromatography–mass spectrometry using subcritical water extraction coupled with dispersed liquid–liquid microextraction and derivatization

43. Development of a method for metabolomic analysis of human exhaled breath condensate by gas chromatography–mass spectrometry in high resolution mode

44. Extraction of climatic signals from fossil organic compounds in marine sediments up to 11.7Ma old (IODP-U1318)

45. Fabric phase sorptive extraction: A new sorptive microextraction technique for the determination of non-steroidal anti-inflammatory drugs from environmental water samples

46. Fast determination of hydroxylated polychlorinated biphenyls in human plasma by online solid phase extraction coupled to liquid chromatography-tandem mass spectrometry

47. Feasibility of ultra-high performance liquid and gas chromatography coupled to mass spectrometry for accurate determination of primary and secondary phthalate metabolites in urine samples

48. Gas chromatography coupled to atmospheric pressure ionization mass spectrometry (GC-API-MS): Review

49. Magnetic N-doped carbon nanotubes: A versatile and efficient material for the determination of polycyclic aromatic hydrocarbons in environmental water samples

50. Metabolic studies of oxyguno in horses

51. Monitoring of phthalates in foodstuffs using gas purge microsyringe extraction coupled with GC–MS

52. Monodisperse microporous carbon nanospheres: An efficient and stable solid phase microextraction coating material

53. Novel application of liquid chromatography/mass spectrometry for the characterization of drying oils in art: Elucidation on the composition of original paint materials used by Edvard Munch (1863–1944)

54. Occurrence of oleic and 18:1 methyl-branched acyl chains in lipids of Rhodobacter sphaeroides 2.4.1

55. On-line monitoring of Soxhlet extraction by chromatography and mass spectrometry to reveal temporal extract profiles

56. Optimal design of experiments applied to headspace solid phase microextraction for the quantification of vicinal diketones in beer through gas chromatography-mass spectrometric detection

57. Polybutylene terephthalate-nickel oxide nanocomposite as a fiber coating

58. Preparation and characterization of metal-organic framework MIL-101(Cr)-coated solid-phase microextraction fiber

59. Preparation of C18 composite solid-phase microextraction fiber and its application to the determination of organochlorine pesticides in water samples

60. Quantification of benzene, toluene, ethylbenzene and o-xylene in internal combustion engine exhaust with time-weighted average solid phase microextraction and gas chromatography mass spectrometry

61. Review of recent developments and applications in low-pressure (vacuum outlet) gas chromatography

62. Simple spectrophotometry method for the determination of sulfur dioxide in an alcohol-thionyl chloride reaction

63. Sol–gel-based silver nanoparticles-doped silica – Polydiphenylamine nanocomposite for micro-solid-phase extraction

64. Bacteria detection based on the evolution of enzyme-generated volatile organic compounds: Determination of Listeria monocytogenes in milk samples

65. Cobalt oxide nanoparticles as a novel high-efficiency fiber coating for solid phase microextraction of benzene, toluene, ethylbenzene and xylene from aqueous solutions

66. Determination of UV filters in both soluble and particulate fractions of seawaters by dispersive liquid–liquid microextraction followed by gas chromatography–mass spectrometry

67. Determination of atranol and chloroatranol in perfumes using simultaneous derivatization and dispersive liquid–liquid microextraction followed by gas chromatography–mass spectrometry

68. Development of solid-phase microextraction to study dissolved organic matter—Polycyclic aromatic hydrocarbon interactions in aquatic environment

69. Experimental validation of an effective carbon number-based approach for the gas chromatography–mass spectrometry quantification of ‘compounds lacking authentic standards or surrogates’

70. Exploring metabolic syndrome serum profiling based on gas chromatography mass spectrometry and random forest models