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You searched for: Journal Journal of separation science Remove constraint Journal: Journal of separation science Publication Year 2015 Remove constraint Publication Year: 2015 Source 2015 v.38 no.13 Remove constraint Source: 2015 v.38 no.13
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1. Analysis of amicarbazone and its two metabolites in grains and soybeans by liquid chromatography with tandem mass spectrometry

Author:
Dong, Maofeng; Nie, Dongxia; Tang, Hongxia; Rao, Qinxiong; Qu, Mingqing; Wang, Weimin; Han, Lijun; Song, Weiguo; Han, Zheng
Source:
Journal of separation science 2015 v.38 no.13 pp. 2245-2252
ISSN:
1615-9306
Subject:
adsorbents; amicarbazone; buckwheat; corn; liquid chromatography; metabolites; rice; soybeans; tandem mass spectrometry; wheat
Abstract:
... A sensitive, simple and reliable analytical method based on a modified quick, easy, cheap, effective, rugged, safe sample preparation and liquid chromatography with tandem mass spectrometry detection was developed for the simultaneous determination of amicarbazone and its two major metabolites desamino amicarbazone and isopropyl‐2‐hydroxy‐desamino amicarbazone residues in grains (rice, wheat, corn ...
DOI:
10.1002/jssc.201500265

2. Application of carbon nanotubes modified with a Keggin polyoxometalate as a new sorbent for the hollow‐fiber micro‐solid‐phase extraction of trace naproxen in hair samples with fluorescence spectrophotometry using factorial experimental design

Author:
Naddaf, Ezzat; Ebrahimi, Mahmoud; Es'haghi, Zarrin; Bamoharram, Fatemeh Farrash
Source:
Journal of separation science 2015 v.38 no.13 pp. 2348-2356
ISSN:
1615-9306
Subject:
analysis of variance; carbon nanotubes; desorption; detection limit; experimental design; fluorescence emission spectroscopy; microextraction; screening; silica; sol-gel processing
Abstract:
... A sensitive technique to determinate naproxen in hair samples was developed using hollow‐fiber micro‐solid‐phase combined with fluorescence spectrophotometry. The incorporation of multi‐walled carbon nanotubes modified with a Keggin polyoxometalate into a silica matrix prepared by the sol–gel method was reported. In this research, the Keggin carbon nanotubes /silica composite was used in the pores ...
DOI:
10.1002/jssc.201401459

3. Capillary electrophoresis with electrochemiluminescence detection for the simultaneous determination of cisatracurium besylate and its degradation products in pharmaceutical preparations

Author:
Zuo, Ming; Gao, Jieying; Zhang, Xiaoqing; Cui, Yue; Fan, Zimian; Ding, Min
Source:
Journal of separation science 2015 v.38 no.13 pp. 2332-2339
ISSN:
1615-9306
Subject:
capillary electrophoresis; correlation; cost effectiveness; detection limit; drugs; ingredients
Abstract:
... Capillary electrophoresis with electrochemiluminescence detection for the simultaneous analysis of cisatracurium besylate and its degradation products (laudanosine, quaternary monoacrylate) in pharmaceutical preparation was developed and fully validated. The significant parameters that influence capillary electrophoresis separation and electrochemiluminescence detection were optimized. The total a ...
DOI:
10.1002/jssc.201500092

4. Comparison of different injection modes in edible oil minor components analysis

Author:
Purcaro, Giorgia; Barp, Laura; Conte, Lanfranco
Source:
Journal of separation science 2015 v.38 no.13 pp. 2278-2285
ISSN:
1615-9306
Subject:
capillary gas chromatography; cooking fats and oils; esters; fatty acids; flame ionization; injectors; olive oil; sterols; thermal degradation; waxes
Abstract:
... Waxes and fatty acid alkyl esters are minor components used as official parameters to control the authenticity and quality of a high‐value olive oil product. A poor measurement can lead to a misleading classification of the oil. The official method requires their analysis together by capillary gas chromatography equipped with a flame ionization detector and an on‐column injector to avoid discrimin ...
DOI:
10.1002/jssc.201401242

5. Determination of organophosphate esters in water samples by mixed‐mode liquid chromatography and tandem mass spectrometry

Author:
Gao, Lihong; Shi, Yali; Li, Wenhui; Ren, Wenli; Liu, Jiemin; Cai, Yaqi
Source:
Journal of separation science 2015 v.38 no.13 pp. 2193-2200
ISSN:
1615-9306
Subject:
acetonitrile; electrospray ionization mass spectrometry; esters; hydrophilicity; hydrophobicity; methylene chloride; phosphates; reversed-phase liquid chromatography; river water; solid phase extraction; solvents; surface water; tandem mass spectrometry
Abstract:
... A simple and sensitive method for the determination of organophosphate esters in water samples by mixed‐mode liquid chromatography with electrospray ionization tandem mass spectrometry coupled with solid‐phase extraction is developed. Using seven alkyl phosphates, three chlorinated alkyl phosphates, and four aryl phosphates as the targets, the developed method was systematically evaluated on the b ...
DOI:
10.1002/jssc.201500213

6. Determination of polycyclic aromatic hydrocarbons in fractions in asphalt mixtures using liquid chromatography coupled to mass spectrometry with atmospheric pressure chemical ionization

Author:
Nascimento, Paulo Cicero; Gobo, Luciana Assis; Bohrer, Denise; Carvalho, Leandro Machado; Cravo, Margareth Coutinho; Leite, Leni Figueiredo Mathias
Source:
Journal of separation science 2015 v.38 no.13 pp. 2238-2244
ISSN:
1615-9306
Subject:
atmospheric pressure; bitumen; carcinogenicity; detection limit; fractionation; ionization; liquid chromatography; mass spectrometry; mutagenicity; polycyclic aromatic hydrocarbons
Abstract:
... An analytical method using liquid chromatography coupled to mass spectrometry with atmospheric pressure chemical ionization for the determination of polycyclic aromatic hydrocarbons in asphalt fractions has been developed. The 14 compounds determined, characterized by having two or more condensed aromatic rings, are expected to be present in asphalt and are considered carcinogenic and mutagenic. T ...
DOI:
10.1002/jssc.201401231

7. Development and validation of a quantification method for ziyuglycoside I and II in rat plasma: Application to their pharmacokinetic studies

Author:
Ye, Wei; Fu, Hanxu; Xie, Lin; Zhou, Lijun; Rao, Tai; Wang, Qian; Shao, Yuhao; Xiao, Jingcheng; Kang, Dian; Wang, Guangji; Liang, Yan
Source:
Journal of separation science 2015 v.38 no.13 pp. 2340-2347
ISSN:
1615-9306
Subject:
liquid chromatography; liquid-liquid extraction; pharmacokinetics; rats; tandem mass spectrometry
Abstract:
... This study provided a novel and generally applicable method to determine ziyuglycoside I and ziyuglycoside II in rat plasma based on liquid chromatography with tandem mass spectrometry. A single step of liquid–liquid extraction with n‐butanol was utilized, and ginsenoside Rg3 was chosen as internal standard. Final extracts were analyzed based on liquid chromatography with tandem mass spectrometry. ...
DOI:
10.1002/jssc.201500102

8. Development of an enzyme‐linked immunosorbent assay and immunoaffinity chromatography for glycyrrhizic acid using an anti‐glycyrrhizic acid monoclonal antibody

Author:
Zhang, Yue; Qu, Huihua; Zeng, Wenhao; Zhao, Yan; Shan, Wenchao; Wang, Xueqian; Wang, Qingguo; Zhao, Yan
Source:
Journal of separation science 2015 v.38 no.13 pp. 2363-2370
ISSN:
1615-9306
Subject:
Oriental traditional medicine; enzyme-linked immunosorbent assay; glycyrrhizin; hybridomas; immunoaffinity chromatography; mice; monoclonal antibodies; myeloma; serum albumin; splenocytes
Abstract:
... In this work, a new monoclonal antibody specific for glycyrrhizic acid was prepared and characterized. A hybridoma secreting an anti‐glycyrrhizic acid monoclonal antibody was produced by fusing splenocytes from a mouse immunized against a glycyrrhizic acid–bovine serum albumin conjugate with the hypoxanthine–aminopterin–thymidine‐sensitive mouse myeloma cell line (Sp2/0‐Ag14). Subsequently, an ind ...
DOI:
10.1002/jssc.201500242

9. Direct determination of acrylamide in food by gas chromatography with nitrogen chemiluminescence detection

Author:
Weijun, Yao
Source:
Journal of separation science 2015 v.38 no.13 pp. 2272-2277
ISSN:
1615-9306
Subject:
acetonitrile; acrylamides; baking; chemiluminescence; detection limit; foods; gas chromatography; nitrogen; risk; solvents; temperature
Abstract:
... A method of gas chromatography with nitrogen chemiluminescence detection and using standard addition is described for the determination of acrylamide in heat‐processed foods. Using a modified QuEChERS (quick, easy, cheap, effective, rugged, and safe) sample preparation method removes the acrylamide precursors completely, and the risk of overestimating acrylamide concentration due to additional ana ...
DOI:
10.1002/jssc.201500060

10. Evaluation of preconcentration methods in the analysis of synthetic musks in whole‐water samples

Author:
Cavalheiro, Joana; Prieto, Ailette; Zuloaga, Olatz; Preudhomme, Hugues; Amouroux, David; Monperrus, Mathilde
Source:
Journal of separation science 2015 v.38 no.13 pp. 2298-2304
ISSN:
1615-9306
Subject:
brackish water; dissolved organic carbon; environmental assessment; hydrophobicity; organic compounds; particulates; solvents; wastewater
Abstract:
... According to the European Water Framework Directive, environmental assessment of organic compounds should be made in whole‐water samples, but due to their hydrophobicity and strong attraction to organic content these compounds can be found bound to suspended particle matter or in the dissolved fraction. In this work, the extraction of musk compounds was studied in whole‐water samples exhibiting di ...
DOI:
10.1002/jssc.201500192

11. Fast determination of octinoxate and oxybenzone uv filters in swimming pool waters by gas chromatography/mass spectrometry after solid‐phase microextraction

Author:
Yılmazcan, Ö; Kanakaki, C.; Izgi, B.; Rosenberg, E.
Source:
Journal of separation science 2015 v.38 no.13 pp. 2286-2297
ISSN:
1615-9306
Subject:
UV filters; coatings; correlation; detection limit; endocrine-disrupting chemicals; gas chromatography; mass spectrometry; pH; solid phase microextraction; swimming; temperature; uncertainty
Abstract:
... A fast gas chromatography/mass spectrometry method was developed and validated for the analysis of the potential endocrine disrupters octinoxate and oxybenzone in swimming pool water samples based on the solvent‐free solid‐phase microextraction technique. The low‐pressure gas chromatography/mass spectrometry method used for the fast identification of UV filter substances was compared to a conventi ...
DOI:
10.1002/jssc.201401250

12. Free amino acids analysis by liquid chromatography with tandem mass spectrometry in several botanicals with antioxidant character

Author:
Moldoveanu, Serban C.; Zhu, Jeff; Qian, Nancy
Source:
Journal of separation science 2015 v.38 no.13 pp. 2208-2222
ISSN:
1615-9306
Subject:
amino acids; antioxidants; free amino acids; hydrochloric acid; ion pair chromatography; ionization; monitoring; reversed-phase liquid chromatography; spectrometers; tandem mass spectrometry
Abstract:
... A novel method based on liquid chromatography with tandem mass spectrometry for the analysis of 19 amino acids in plant materials is described. For the analysis, the plant material is extracted with 0.1 N hydrochloric acid with internal standards present in the extraction solution. The filtered extracts are injected using no clean‐up into the liquid chromatographic system coupled with a triple‐qua ...
DOI:
10.1002/jssc.201500162

13. Graphene oxide based in‐tube solid‐phase microextraction combined with liquid chromatography tandem mass spectrometry for the determination of triazine herbicides in water

Author:
Tan, Feng; Zhao, Cong; Li, Lianjun; Liu, Min; He, Xin; Gao, Jinsuo
Source:
Journal of separation science 2015 v.38 no.13 pp. 2312-2319
ISSN:
1615-9306
Subject:
coatings; detection limit; graphene oxide; hydrogen bonding; ionic strength; liquid chromatography; river water; scanning electron microscopy; seawater; solid phase microextraction; tandem mass spectrometry; tap water; triazine herbicides
Abstract:
... A novel in‐tube solid‐phase microextraction method based on a graphene oxide coated column was developed for the determination of triazines in waters. This column was prepared by the covalent modification of monolayer graphene oxide sheets onto the inner wall of a fused‐silica capillary. Scanning electron microscopy showed that the thickness of the graphene oxide coating was ∼30 nm, with a porous, ...
DOI:
10.1002/jssc.201500070

14. Hydrophilic interaction liquid chromatography for the separation of acidic agricultural compounds

Author:
Yang, Peilin; Pursch, Matthias
Source:
Journal of separation science 2015 v.38 no.13 pp. 2253-2259
ISSN:
1615-9306
Subject:
hydrophilic interaction chromatography; organic acids and salts; pH; reversed-phase liquid chromatography; silica; temperature
Abstract:
... Organic acids with very low pKₐ require extremely low pH conditions to achieve adequate retention in reversed‐phase liquid chromatography, but an extremely low pH mobile phase can cause instrument reliability problems and limit the choice of columns. Hydrophilic interaction chromatography is a potential alternative to reversed‐phase liquid chromatography for the separation of organic acids using m ...
DOI:
10.1002/jssc.201500143

15. Kinetics and equilibria of the chromatographic separation of maltose and trehalose

Author:
He, Dengjun; Zhou, Jiachun; Xia, Quanming; Jiang, Lihua; Qiu, Yongjun; Zhao, Liming
Source:
Journal of separation science 2015 v.38 no.13 pp. 2229-2237
ISSN:
1615-9306
Subject:
cation exchange; chromatography; cosmetics; maltose; mass transfer; models; sorption isotherms; temperature; trehalose
Abstract:
... Trehalose, a nonreducing disaccharide, has been extensively applied to food, cosmetics, and pharmaceutical goods. The resultant solution of trehalose prepared by enzymatic methods includes high amounts of maltose. However, it is quite difficult to separate maltose and trehalose on an industrial scale because of their similar properties. In this paper, a high‐performance resin was selected as a sta ...
DOI:
10.1002/jssc.201500005

16. Monolithic capillary columns based on pentaerythritol acrylates for molecular‐size‐based separations of synthetic polymers

Author:
Kurganov, Alexander; Victorova, Elena; Kanateva, Anastasiia
Source:
Journal of separation science 2015 v.38 no.13 pp. 2223-2228
ISSN:
1615-9306
Subject:
acrylates; adsorbents; gel chromatography; hydrodynamics; polymerization; polystyrenes; porosity; temperature
Abstract:
... Monolithic capillary columns based on pentaerythritol triacrylate and pentaerythritol tetraacrylate were synthesized using different compositions of polymerization mixtures and different polymerization conditions. The impact of porogen type and porogen/monomer ratio on the porosity of synthesized monoliths was investigated. Porogen type appears to be the main factor influencing the separating prop ...
DOI:
10.1002/jssc.201500211

17. Optimized hydrolysis and analysis of Radix Asparagi polysaccharide monosaccharide composition by capillary zone electrophoresis

Author:
Chen, Jiye; Yang, Feifei; Guo, Huaizhong; Wu, Fang; Wang, Xiaohuan
Source:
Journal of separation science 2015 v.38 no.13 pp. 2327-2331
ISSN:
1615-9306
Subject:
absorption; arabinose; bioactive properties; capillary zone electrophoresis; galactose; galacturonic acid; glucose; glucuronic acid; hydrolysis; mannose; pH; polysaccharides; quality control; rhamnose; sodium; sulfuric acid; temperature; xylose
Abstract:
... Using orthogonal design, optimized conditions for the hydrolysis of the polysaccharide from Radix Asparagi were determined, as well as its monosaccharide composition. Optimized hydrolysis conditions were a temperature of 100°C in 1.5 M sulfuric acid solution for 5 h. The resulting monosaccharides were derivatized with 1‐phenyl‐3‐methyl‐5‐pyrazolone, then separated by capillary zone electrophoresis ...
DOI:
10.1002/jssc.201500120

18. Practical method for the rapid screening of xanthine oxidase inhibitors in herbal extracts by high‐performance liquid chromatography based on on‐line precolumn enzymatic reaction

Author:
Zhou, Chun‐Hua; Li, De‐Qiang; Xiao, Yuan‐Yuan; Yang, Xiu‐Ling; Zhang, Zhi‐Qing
Source:
Journal of separation science 2015 v.38 no.13 pp. 2267-2271
ISSN:
1615-9306
Subject:
Epimedium; Oriental traditional medicine; absorption; allopurinol; enzymatic reactions; enzyme inhibition; high performance liquid chromatography; inhibitory concentration 50; rapid methods; screening; uric acid; xanthine oxidase
Abstract:
... A high‐performance liquid chromatography method with on‐line precolumn enzymatic reaction for the screening of xanthine oxidase inhibitors in natural extracts was developed. In this method, the enzymatic reaction occurred at the capillary inlet during a predetermined waiting period, after which the reaction product, uric acid, was separated and detected by liquid chromatography using ultraviolet a ...
DOI:
10.1002/jssc.201500202

19. Quantitative analysis of acankoreoside A and acankoreagenin in the leaves of Schefflera octophylla and Schefflera actinophylla using pressurized liquid extraction and high‐performance liquid chromatography coupled with evaporative light scattering detection

Author:
Cao, Kai‐Yue; Qiao, Chun‐Feng; Zhao, Jing; Xie, Jing; Li, Shao‐Ping
Source:
Journal of separation science 2015 v.38 no.13 pp. 2201-2207
ISSN:
1615-9306
Subject:
Schefflera actinophylla; acetonitrile; bioactive properties; cluster analysis; formic acid; high performance liquid chromatography; leaves; light scattering; quality control; quantitative analysis; rapid methods; triterpenoids
Abstract:
... A rapid method based on pressurized liquid extraction followed by high‐performance liquid chromatography coupled with evaporative light scattering detection was firstly developed for the quantitative analysis of two bioactive triterpenoids (acankoreoside A and acankoreagenin) in the leaves of Schefflera octophylla and Schefflera actinophylla. The analysis was performed on an Agilent Zorbax SB‐Aq c ...
DOI:
10.1002/jssc.201500223

20. Quantitative determination of dopamine in single rat pheochromocytoma cells by microchip electrophoresis with only one high‐voltage power supply

Author:
Sha, Cuicui; Fan, Yuejuan; Cheng, Jieke; Cheng, Han
Source:
Journal of separation science 2015 v.38 no.13 pp. 2357-2362
ISSN:
1615-9306
Subject:
capillary electrophoresis; carbon fibers; dopamine; quantitative analysis; rats
Abstract:
... We developed a method for the direct identification of dopamine in single cultured rat pheochromocytoma cells by capillary electrophoresis using an end‐channel carbon fiber nanoelectrode amperometric detector. The operation mode was designed to achieve single‐cell injection and lysis in microfluidic chip electrophoresis with only one high‐voltage power supply. The separation and detection conditio ...
DOI:
10.1002/jssc.201500009