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You searched for: Journal name Analytica chimica acta Remove constraint Journal name: Analytica chimica acta Subject term derivatization Remove constraint Subject term: derivatization Subject term gas chromatography-mass spectrometry Remove constraint Subject term: gas chromatography-mass spectrometry
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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

2. 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

3. Analysis of stable isotope assisted metabolomics data acquired by GC-MS

Author:
Xiaoli Wei; Biyun Shi; Imhoi Koo; Xinmin Yin; Pawel Lorkiewicz; Hamid Suhail; Ramandeep Rattan; Shailendra Giri; Craig J. McClain; Xiang Zhang
Source:
Analytica chimica acta 2017 pp. -
ISSN:
0003-2670
Subject:
amino acids; analytical chemistry; derivatization; gas chromatography-mass spectrometry; hydrogen; ionization; isotope labeling; metabolites; metabolomics; regression analysis; stable isotopes
Abstract:
... Stable isotope assisted metabolomics (SIAM) measures the abundance levels of metabolites in a particular pathway using stable isotope tracers (e.g., 13C, 18O and/or 15N). We report a method termed signature ion approach for analysis of SIAM data acquired on a GC-MS system equipped with an electron ionization (EI) ion source. The signature ion is a fragment ion in EI mass spectrum of a derivatized ...
DOI:
10.1016/j.aca.2017.05.002
PubMed:
28622800
PubMed Central:
PMC5541907

4. 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

5. 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

6. 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

7. 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

8. 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

9. 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

10. 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

11. 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

12. 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

13. 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

14. 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

15. 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

16. 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

17. 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

18. 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

19. Sensitive determination of hydrazine in water by gas chromatography–mass spectrometry after derivatization with ortho-phthalaldehyde

Author:
Jin-Aa Oh; Ju-Hyun Park; Ho-Sang Shin
Source:
Analytica chimica acta 2013 v.769 pp. 79-83
ISSN:
0003-2670
Subject:
derivatization; drinking water; gas chromatography-mass spectrometry; hydrazine; methylene chloride; pH; surface water
Abstract:
... A gas chromatography–mass spectrometric (GC–MS) method has been established for the determination of hydrazine in drinking water and surface water. This method is based on the derivatization of hydrazine with ortho-phthalaldehyde (OPA) in water. The following optimum reaction conditions were established: reagent dosage, 40mgmL−1 of OPA; pH 2; reaction for 20min at 70°C. The organic derivative was ...
DOI:
10.1016/j.aca.2013.01.036

20. 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

21. Determination of hydroxylated metabolites of polycyclic aromatic hydrocarbons in sediment samples by combining subcritical water extraction and dispersive liquid–liquid microextraction with derivatization

Author:
Xiaowei Wang; Li Lin; Tiangang Luan; Lihua Yang; Nora F.Y. Tam
Source:
Analytica chimica acta 2012 v.753 no. pp. 57-63
ISSN:
0003-2670
Subject:
sediments; derivatization; detection limit; sediment contamination; phenanthrenes; liquid-phase microextraction; solvents; temperature; solid phase extraction; metabolites; gas chromatography-mass spectrometry
Abstract:
... A sample preparation method for the determination of hydroxylated polycyclic aromatic hydrocarbons (OH-PAHs) in sediment samples was developed using gas chromatography–mass spectrometry (GC–MS). Dispersive liquid–liquid microextraction (DLLME) with derivatization was performed following the subcritical water extraction (SWE) that provided which was provided by accelerated solvent extraction (ASE). ...
DOI:
10.1016/j.aca.2012.09.028

22. Determination of polycyclic aromatic hydrocarbons and their oxy-, nitro-, and hydroxy-oxidation products

Author:
R.E. Cochran; N. Dongari; H. Jeong; J. Beránek; S. Haddadi; J. Shipp; A. Kubátová
Source:
Analytica chimica acta 2012 v.740 no. pp. 93-103
ISSN:
0003-2670
Subject:
air; derivatization; gas chromatography-mass spectrometry; ionization; methane; monitoring; oxidation; particulates; polycyclic aromatic hydrocarbons; smoke; solid phase extraction; temperature
Abstract:
... A sensitive method has been developed for the trace analysis of PAHs and their oxidation products (i.e., nitro-, oxy-, and hydroxy-PAHs) in air particulate matter (PM). Following PM extraction, PAHs, nitro-, oxy-, and hydroxy-PAHs were fractionated using solid phase extraction (SPE) based on their polarities. Gas chromatography–mass spectrometry (GC–MS) conditions were optimized, addressing inject ...
DOI:
10.1016/j.aca.2012.05.050

23. In situ solid-phase microextraction and post on-fiber derivatization combined with gas chromatography–mass spectrometry for determination of phenol in occupational air

Author:
Ali Es-haghi; Masoud Baghernejad; Habib Bagheri
Source:
Analytica chimica acta 2012 v.742 no. pp. 17-21
ISSN:
0003-2670
Subject:
air; coatings; correlation; derivatization; desorption; detection limit; gas chromatography-mass spectrometry; monitoring; phenol; polyethylene glycol; rapid methods; solid phase microextraction; temperature
Abstract:
... A method based on solid-phase microextraction (SPME) followed by on-fiber derivatization and gas chromatography–mass spectrometry detection (GC–MS) for determination of phenol in air was developed. Three different types of SPME fibers, polar and non-polar poly(dimethylsiloxane) (PDMS) and polyethylene glycol (PEG) were synthesized using sol–gel technology and their feasibility to the sampling of p ...
DOI:
10.1016/j.aca.2012.01.002

24. Sensitive and robotic determination of bromate in sea water and drinking deep-sea water by headspace solid-phase micro extraction and gas chromatography–mass spectrometry

Author:
Hyun-Hee Lim; Ho-Sang Shin
Source:
Analytica chimica acta 2012 v.741 no. pp. 32-37
ISSN:
0003-2670
Subject:
ammonium compounds; barium; calcium; chlorides; derivatization; drinking water; gas chromatography-mass spectrometry; headspace analysis; heat; hydrochloric acid; ions; iron; magnesium; manganese; nitrates; potassium; seawater; sodium; solid phase microextraction; sulfates; temperature
Abstract:
... A robotic method has been established for the determination of bromate in sea water and drinking deep-sea water. Bromate in water was converted into volatile derivative, which was measured with headspace solid-phase micro extraction and gas chromatography–mass spectrometry (HS-SPME GC–MS). Derivatization reagent and the HS-SPME parameters (selection of fibre, extraction/derivatization temperature, ...
DOI:
10.1016/j.aca.2012.06.046

25. Simultaneous determination of ultraviolet filters in aqueous samples by plunger-in-needle solid-phase microextraction with graphene-based sol–gel coating as sorbent coupled with gas chromatography–mass spectrometry

Author:
Hong Zhang; Hian Kee Lee
Source:
Analytica chimica acta 2012 v.742 no. pp. 67-73
ISSN:
0003-2670
Subject:
benzophenones; derivatization; detection limit; coatings; UV filters; mixing; camphor; river water; pH; salt concentration; solid phase microextraction; graphene; temperature; filters; gas chromatography-mass spectrometry
Abstract:
... A simple, sensitive and selective method for the simultaneous determination of five ultraviolet (UV) filters: benzophenone, octyl salicylate, homosalate, 3-(4-methylbenzylidene) camphor, 2-hydroxy-4-methoxybenzophenone in aqueous samples was developed. The analytes were extracted by plunger-in-needle solid-phase microextraction with graphene as sorbent, then silylated on-fiber with N-methyl-N-(tri ...
DOI:
10.1016/j.aca.2012.03.016

26. Determination of amphetamine-type stimulants in oral fluid by solid-phase microextraction and gas chromatography–mass spectrometry

Author:
Daniele Z. Souza; Paula O. Boehl; Eloisa Comiran; Kristiane C. Mariotti; Flavio Pechansky; Paulina C.A.V. Duarte; Raquel De Boni; Pedro E. Froehlich; Renata P. Limberger
Source:
Analytica chimica acta 2011 v.696 no.1-2 pp. 67-76
ISSN:
0003-2670
Subject:
screening; derivatization; detection limit; monitoring; least squares; amphetamine; quality control; solid phase microextraction; deuterium; statistical models; gas chromatography-mass spectrometry
Abstract:
... A method for the simultaneous identification and quantification of amphetamine (AMP), methamphetamine (MET), fenproporex (FEN), diethylpropion (DIE) and methylphenidate (MPH) in oral fluid collected with Quantisal™ device has been developed and validated. Thereunto, in-matrix propylchloroformate derivatization followed by direct immersion solid-phase microextraction and gas chromatography–mass spe ...
DOI:
10.1016/j.aca.2011.04.014

27. Fully automated solid-phase microextraction–fast gas chromatography–mass spectrometry method using a new ionic liquid column for high-throughput analysis of sarcosine and N-ethylglycine in human urine and urinary sediments

Author:
F. Bianchi; S. Dugheri; M. Musci; A. Bonacchi; E. Salvadori; G. Arcangeli; V. Cupelli; M. Lanciotti; L. Masieri; S. Serni; M. Carini; M. Careri; A. Mangia
Source:
Analytica chimica acta 2011 v.707 no.1-2 pp. 197-203
ISSN:
0003-2670
Subject:
automation; biomarkers; creatinine; derivatization; gas chromatography-mass spectrometry; humans; hypertrophy; ionic liquids; patients; prostatic neoplasms; sediments; urine
Abstract:
... A fully automated, non invasive, rapid and high-throughput method for the direct determination of sarcosine and N-ethylglycine in urine and urinary sediments using hexyl chloroformate derivatization followed by direct immersion solid-phase micro extraction and fast gas chromatography–mass spectrometric analysis was developed and validated. The use of a new ionic liquid narrow bore column, as well ...
DOI:
10.1016/j.aca.2011.09.015

28. Selective determination of estrogenic compounds in water by microextraction by packed sorbents and a molecularly imprinted polymer coupled with large volume injection-in-port-derivatization gas chromatography–mass spectrometry

Author:
A. Prieto; A. Vallejo; O. Zuloaga; A. Paschke; B. Sellergen; E. Schillinger; S. Schrader; M. Möder
Source:
Analytica chimica acta 2011 v.703 no.1 pp. 41-51
ISSN:
0003-2670
Subject:
adsorbents; bisphenol A; derivatization; detection limit; endocrine-disrupting chemicals; equilin; gas chromatography-mass spectrometry; microextraction; molecular imprinting; polymers; rivers; silica gel; solvents; system optimization; wastewater
Abstract:
... A fully automated protocol consisting of microextraction by packed sorbents (MEPS) coupled with large volume injection-in-port-derivatization-gas chromatography–mass spectrometry (LVI-derivatization-GC–MS) was developed to determine endocrine disrupting compounds (EDCs) such as alkylphenols, bisphenol A, and natural and synthetic hormons in river and waste water samples. During method optimization ...
DOI:
10.1016/j.aca.2011.07.007