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A simple validated multi‐analyte method for detecting drugs in oral fluid by ultra‐performance liquid chromatography–tandem mass spectrometry (UPLC–MS/MS)

Published: Dec 18, 2017

Author(s): Yufang Zheng, Erik Sparve, Mats Bergström

Journal: Drug Testing and Analysis

Abstract Oral fluid sampling offers several advantages compared to other methods of detecting drugs in biological matrices due to its easy sampling procedure and simple supervision. Hence, the use of oral fluid for drug testing is increasing in workplaces and in roadside testing. As a result, more laboratories are required to perform analyses of drugs in oral fluid. A multi‐method using ultra performance liquid...

Read More thumbnail image: A simple validated multianalyte method for detecting drugs in oral fluid by ultraperformance liquid chromatographytandem mass spectrometry UPLCMSMS

A simple validated multi‐analyte method for detecting drugs in oral fluid by ultra‐performance liquid chromatography–tandem mass spectrometry (UPLC–MS/MS)

Published: Dec 18, 2017

Author(s): Yufang Zheng, Erik Sparve, Mats Bergström

Journal: Drug Testing and Analysis

Abstract Oral fluid sampling offers several advantages compared to other methods of detecting drugs in biological matrices due to its easy sampling procedure and simple supervision. Hence, the use of oral fluid for drug testing is increasing in workplaces and in roadside testing. As a result, more laboratories are required to perform analyses of drugs in oral fluid. A multi‐method using ultra performance liquid...

Read More thumbnail image: A simple validated multianalyte method for detecting drugs in oral fluid by ultraperformance liquid chromatographytandem mass spectrometry UPLCMSMS

Semi‐quantitative analysis of tramadol, dextromethorphan, and metabolites in decomposed skeletal tissues by ultra performance liquid chromatography quadrupole time of flight mass spectrometry

Published: Dec 18, 2017

Author(s): H. M. Cornthwaite, L. Labine, J. H. Watterson

Journal: Drug Testing and Analysis

Abstract The use of filtration/pass‐through extraction (FPTE) and ultra‐performance liquid chromatography quadrupole time‐of‐flight mass spectrometry (UPLC–qTOF–MS) to detect tramadol (TRAM), dextromethorphan (DXM), and metabolites from skeletal remains is described. Rats (n=5) received 50 mg/kg tramadol and were euthanized by CO2 asphyxiation approximately 30 minutes post‐dose. Rats (n=4) received 75 mg/kg dextromethorphan and were euthanized...

Read More thumbnail image: Semiquantitative analysis of tramadol dextromethorphan and metabolites in decomposed skeletal tissues by ultra performance liquid chromatography quadrupole time of flight mass spectrometry

Semi‐quantitative analysis of tramadol, dextromethorphan, and metabolites in decomposed skeletal tissues by ultra performance liquid chromatography quadrupole time of flight mass spectrometry

Published: Dec 18, 2017

Author(s): H. M. Cornthwaite, L. Labine, J. H. Watterson

Journal: Drug Testing and Analysis

Abstract The use of filtration/pass‐through extraction (FPTE) and ultra‐performance liquid chromatography quadrupole time‐of‐flight mass spectrometry (UPLC–qTOF–MS) to detect tramadol (TRAM), dextromethorphan (DXM), and metabolites from skeletal remains is described. Rats (n=5) received 50 mg/kg tramadol and were euthanized by CO2 asphyxiation approximately 30 minutes post‐dose. Rats (n=4) received 75 mg/kg dextromethorphan and were euthanized...

Read More thumbnail image: Semiquantitative analysis of tramadol dextromethorphan and metabolites in decomposed skeletal tissues by ultra performance liquid chromatography quadrupole time of flight mass spectrometry

Evaluation of markers out of the steroid profile for the screening of testosterone misuse. Part I: Transdermal administration

Published: Dec 18, 2017

Author(s): Aristotelis Kotronoulas, Àlex Gomez‐Gómez, Andreu Fabregat, Jordi Segura, Sheng Yang, Yanyi Xing, Wu Moutian, Josep Marcos, Jesús Joglar, Rosa Ventura, Oscar J. Pozo

Journal: Drug Testing and Analysis

Abstract Although the introduction by the World Anti‐Doping Agency (WADA) of the steroid module of the athlete biological passport (ABP) marked an important step forward in the screening of testosterone (T) misuse, it still remains one of the most difficult challenges in doping control analysis. The urinary determination of alternative markers has been recently reported as a promising tool for improving the screening of T oral...

Read More thumbnail image: Evaluation of markers out of the steroid profile for the screening of testosterone misuse_ Part I Transdermal administration

Evaluation of markers out of the steroid profile for the screening of testosterone misuse. Part I: Transdermal administration

Published: Dec 18, 2017

Author(s): Aristotelis Kotronoulas, Àlex Gomez‐Gómez, Andreu Fabregat, Jordi Segura, Sheng Yang, Yanyi Xing, Wu Moutian, Josep Marcos, Jesús Joglar, Rosa Ventura, Oscar J. Pozo

Journal: Drug Testing and Analysis

Abstract Although the introduction by the World Anti‐Doping Agency (WADA) of the steroid module of the athlete biological passport (ABP) marked an important step forward in the screening of testosterone (T) misuse, it still remains one of the most difficult challenges in doping control analysis. The urinary determination of alternative markers has been recently reported as a promising tool for improving the screening of T oral...

Read More thumbnail image: Evaluation of markers out of the steroid profile for the screening of testosterone misuse_ Part I Transdermal administration

Rapid identification of gutter oil by detecting the capsaicin using surface enhanced Raman spectroscopy

Published: Dec 18, 2017

Author(s): Kangzhen Tian, Wen Wang, Yue Yao, Xinming Nie, Aixia Lu, Ying Wu, Caiqin Han

Journal: Journal of Raman Spectroscopy

Abstract Accurate determination of the gutter oil represents a major food safety challenge. Here, we propose to use the surface enhanced Raman spectroscopy (SERS) with silver nanorod array substrates to detect the capsaicin, a marker of the gutter oil that is difficult to remove. The capsaicin has several characteristic SERS peaks at Δv = 807 cm−1, Δv = 1, 264 cm−1, and so forth, which correspond to the C39‐C37‐C43...

Read More thumbnail image: Rapid identification of gutter oil by detecting the capsaicin using surface enhanced Raman spectroscopy

Rapid identification of gutter oil by detecting the capsaicin using surface enhanced Raman spectroscopy

Published: Dec 18, 2017

Author(s): Kangzhen Tian, Wen Wang, Yue Yao, Xinming Nie, Aixia Lu, Ying Wu, Caiqin Han

Journal: Journal of Raman Spectroscopy

Abstract Accurate determination of the gutter oil represents a major food safety challenge. Here, we propose to use the surface enhanced Raman spectroscopy (SERS) with silver nanorod array substrates to detect the capsaicin, a marker of the gutter oil that is difficult to remove. The capsaicin has several characteristic SERS peaks at Δv = 807 cm−1, Δv = 1, 264 cm−1, and so forth, which correspond to the C39‐C37‐C43...

Read More thumbnail image: Rapid identification of gutter oil by detecting the capsaicin using surface enhanced Raman spectroscopy

Direct observation of 4‐nitrophenyl disulfide produced from p‐nitrothiophenol in air by Raman spectroscopy

Published: Dec 18, 2017

Author(s): Yun Ling, Wen‐Chang Xie, Wei‐Li Wang, Meng‐Kai Li, Jing Tang, Guo‐Kun Liu, Run‐Wen Yan, De‐Yin Wu

Journal: Journal of Raman Spectroscopy

Abstract Taking the fingerprint characteristics of Raman spectroscopy, the dimerization of p‐nitrothiophenol (PNTP) to 4‐nitrophenyl disulfide in air was investigated, which could be accelerated by the external laser illumination. The dimerization was qualitatively confirmed by both mass spectroscopy experimentally and by Raman spectrum simulated calculations theoretically and quantitatively analyzed by Raman spectroscopy in a...

Read More thumbnail image: Direct observation of 4nitrophenyl disulfide produced from pnitrothiophenol in air by Raman spectroscopy

Direct observation of 4‐nitrophenyl disulfide produced from p‐nitrothiophenol in air by Raman spectroscopy

Published: Dec 18, 2017

Author(s): Yun Ling, Wen‐Chang Xie, Wei‐Li Wang, Meng‐Kai Li, Jing Tang, Guo‐Kun Liu, Run‐Wen Yan, De‐Yin Wu

Journal: Journal of Raman Spectroscopy

Abstract Taking the fingerprint characteristics of Raman spectroscopy, the dimerization of p‐nitrothiophenol (PNTP) to 4‐nitrophenyl disulfide in air was investigated, which could be accelerated by the external laser illumination. The dimerization was qualitatively confirmed by both mass spectroscopy experimentally and by Raman spectrum simulated calculations theoretically and quantitatively analyzed by Raman spectroscopy in a...

Read More thumbnail image: Direct observation of 4nitrophenyl disulfide produced from pnitrothiophenol in air by Raman spectroscopy

Rapid analysis of traditional Chinese medicine Pinellia ternata by microchip electrophoresis with electrochemical detection

Published: Dec 18, 2017

Author(s): Tsung‐Ting Shih, Hui‐Ling Lee, Show‐Chuen Chen, Chih‐Yuan Kang, Ren‐Shang Shen, Yi‐An Su

Journal: Journal of Separation Science

Abstract Traditional Chinese herbal medicine has long enjoyed the reputation of the world's most advanced system of natural medicine. Pinellia ternata is one of the most commonly used herbs in the traditional Chinese medical science. In this study, five representative ingredients of Pinellia ternata guanosine, methionine, glycine, 3,4‐dihydroxybenzaldehyde, and homogentisic acid, were assayed using simple derivatization procedures....

Read More thumbnail image: Rapid analysis of traditional Chinese medicine Pinellia ternata by microchip electrophoresis with electrochemical detection

Rapid analysis of traditional Chinese medicine Pinellia ternata by microchip electrophoresis with electrochemical detection

Published: Dec 18, 2017

Author(s): Tsung‐Ting Shih, Hui‐Ling Lee, Show‐Chuen Chen, Chih‐Yuan Kang, Ren‐Shang Shen, Yi‐An Su

Journal: Journal of Separation Science

Abstract Traditional Chinese herbal medicine has long enjoyed the reputation of the world's most advanced system of natural medicine. Pinellia ternata is one of the most commonly used herbs in the traditional Chinese medical science. In this study, five representative ingredients of Pinellia ternata guanosine, methionine, glycine, 3,4‐dihydroxybenzaldehyde, and homogentisic acid, were assayed using simple derivatization procedures....

Read More thumbnail image: Rapid analysis of traditional Chinese medicine Pinellia ternata by microchip electrophoresis with electrochemical detection

Coating of optical fiber with a smart thermosensitive polymer for the separation of phthalate esters by solid‐phase microextraction

Published: Dec 18, 2017

Author(s): Hamid Hashemi‐Moghaddam, Setayesh Maddah

Journal: Journal of Separation Science

Abstract A solid‐phase microextraction fiber was prepared by coating an optical fiber with a temperature‐sensitive polymer to determine phthalate esters. N‐Isopropylacrylamide and N,N′‐methylenebisacrylamide were used as the monomer and the cross linker, respectively. The fabricated fiber was characterized by FTIR spectroscopy, thermogravimetric analysis, and scanning electron microscopy. During extraction, important factors such as...

Read More thumbnail image: Coating of optical fiber with a smart thermosensitive polymer for the separation of phthalate esters by solidphase microextraction

Coating of optical fiber with a smart thermosensitive polymer for the separation of phthalate esters by solid‐phase microextraction

Published: Dec 18, 2017

Author(s): Hamid Hashemi‐Moghaddam, Setayesh Maddah

Journal: Journal of Separation Science

Abstract A solid‐phase microextraction fiber was prepared by coating an optical fiber with a temperature‐sensitive polymer to determine phthalate esters. N‐Isopropylacrylamide and N,N′‐methylenebisacrylamide were used as the monomer and the cross linker, respectively. The fabricated fiber was characterized by FTIR spectroscopy, thermogravimetric analysis, and scanning electron microscopy. During extraction, important factors such as...

Read More thumbnail image: Coating of optical fiber with a smart thermosensitive polymer for the separation of phthalate esters by solidphase microextraction

One‐pot synthesis of a multi‐template molecularly imprinted polymer for the extraction of six sulfonamide residues from milk before high‐performance liquid chromatography with diode array detection

Published: Dec 18, 2017

Author(s): Maria Kechagia, Victoria Samanidou, Abuzar Kabir, Kenneth G. Furton

Journal: Journal of Separation Science

Abstract A highly selective molecularly imprinted polymer sorbent was synthesized and employed for the simultaneous determination of six sulfonamide antibiotic residues (sulfanilamide, sulfacetamide, sulfadiazine, sulfathiazole, sulfamerazine, and sulfamethizole) in milk samples. Multi‐analyte imprinted particles were used as a sorbent in solid‐phase extraction. Sulfonamides were separated on a high‐performance liquid chromatography...

Read More thumbnail image: Onepot synthesis of a multitemplate molecularly imprinted polymer for the extraction of six sulfonamide residues from milk before highperformance liquid chromatography with diode array detection

One‐pot synthesis of a multi‐template molecularly imprinted polymer for the extraction of six sulfonamide residues from milk before high‐performance liquid chromatography with diode array detection

Published: Dec 18, 2017

Author(s): Maria Kechagia, Victoria Samanidou, Abuzar Kabir, Kenneth G. Furton

Journal: Journal of Separation Science

Abstract A highly selective molecularly imprinted polymer sorbent was synthesized and employed for the simultaneous determination of six sulfonamide antibiotic residues (sulfanilamide, sulfacetamide, sulfadiazine, sulfathiazole, sulfamerazine, and sulfamethizole) in milk samples. Multi‐analyte imprinted particles were used as a sorbent in solid‐phase extraction. Sulfonamides were separated on a high‐performance liquid chromatography...

Read More thumbnail image: Onepot synthesis of a multitemplate molecularly imprinted polymer for the extraction of six sulfonamide residues from milk before highperformance liquid chromatography with diode array detection

Metabolic profile of Kudiezi injection in rats by UHPLC coupled with Fourier transform ion cyclotron resonance mass spectrometry

Published: Dec 18, 2017

Author(s): Jingdan Zhang, Xiaoxue Zhang, Yangyang Zhao, Aihua Song, Wei Sun, Ran Yin

Journal: Journal of Separation Science

Abstract In this study, a reliable and sensitive ultra‐high performance liquid chromatography coupled with fourier transform ion cyclotron resonance mass spectrometry method was developed for the systematic study of the metabolic profile of Kudiezi injection in rat plasma, bile, urine, and feces after intravenous administration of a single dose. The chromatographic separation was performed on an Agilent Eclipse Plus C18 column...

Read More thumbnail image: Metabolic profile of Kudiezi injection in rats by UHPLC coupled with Fourier transform ion cyclotron resonance mass spectrometry

Metabolic profile of Kudiezi injection in rats by UHPLC coupled with Fourier transform ion cyclotron resonance mass spectrometry

Published: Dec 18, 2017

Author(s): Jingdan Zhang, Xiaoxue Zhang, Yangyang Zhao, Aihua Song, Wei Sun, Ran Yin

Journal: Journal of Separation Science

Abstract In this study, a reliable and sensitive ultra‐high performance liquid chromatography coupled with fourier transform ion cyclotron resonance mass spectrometry method was developed for the systematic study of the metabolic profile of Kudiezi injection in rat plasma, bile, urine, and feces after intravenous administration of a single dose. The chromatographic separation was performed on an Agilent Eclipse Plus C18 column...

Read More thumbnail image: Metabolic profile of Kudiezi injection in rats by UHPLC coupled with Fourier transform ion cyclotron resonance mass spectrometry

Development of a LC–MS/MS method for the determination of isomeric glutamyl peptides in food ingredients

Published: Dec 18, 2017

Author(s): Vincent Desfontaine, Alexandre Goyon, Jean‐Luc Veuthey, Joséphine Charve, Davy Guillarme

Journal: Journal of Separation Science

Abstract A liquid chromatography with tandem mass spectrometry method was developed for the determination of 27 glutamyl di‐ and tripeptides in food ingredients. Such compounds are of importance for the food industry, as they can modulate the perception of basic tastes (sweet, salty, and umami). Due to their high polarity, the hydrophilic interaction chromatography mode was selected to have sufficient retention on the column and the...

Read More thumbnail image: Development of a LCMSMS method for the determination of isomeric glutamyl peptides in food ingredients

Development of a LC–MS/MS method for the determination of isomeric glutamyl peptides in food ingredients

Published: Dec 18, 2017

Author(s): Vincent Desfontaine, Alexandre Goyon, Jean‐Luc Veuthey, Joséphine Charve, Davy Guillarme

Journal: Journal of Separation Science

Abstract A liquid chromatography with tandem mass spectrometry method was developed for the determination of 27 glutamyl di‐ and tripeptides in food ingredients. Such compounds are of importance for the food industry, as they can modulate the perception of basic tastes (sweet, salty, and umami). Due to their high polarity, the hydrophilic interaction chromatography mode was selected to have sufficient retention on the column and the...

Read More thumbnail image: Development of a LCMSMS method for the determination of isomeric glutamyl peptides in food ingredients
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