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Rapid quantification and screening of nitrogen-containing rocket fuel transformation products by vortex assisted liquid-liquid microextraction and gas chromatography – high-resolution Orbitrap mass spectrometry. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106821] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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2
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Liu J, Benowitz NL, Hatsukami DK, Havel CM, Lazcano-Ponce E, Strasser AA, Jacob P. 3-Ethenylpyridine Measured in Urine of Active and Passive Smokers: A Promising Biomarker and Toxicological Implications. Chem Res Toxicol 2021; 34:1630-1639. [PMID: 33998799 DOI: 10.1021/acs.chemrestox.1c00064] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In studies of tobacco toxicology, including comparisons of different tobacco products and exposure to secondhand or thirdhand smoke, exposure assessment using biomarkers is often useful. Some studies have indicated that most of the toxicity of tobacco smoke is due to gas-phase compounds. 3-Ethenylpyridine (3-EP) is a major nicotine pyrolysis product occurring in the gas phase of tobacco smoke. It has been used extensively as an environmental tracer for tobacco smoke. 3-EP would be expected to be a useful tobacco smoke biomarker as well, but nothing has been published about its metabolism and excretion in humans. In this Article we describe a solid-phase microextraction (SPME) GC-MS/MS method for determination of 3-EP in human urine and its application to the determination of 3-EP in the urine of smokers and people exposed to secondhand smoke. We conclude that 3-EP is a promising biomarker that could be useful in studies of tobacco smoke exposure and toxicology. We also point out the paucity of data on 3-EP toxicity and suggest that additional studies are needed.
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Affiliation(s)
- Jia Liu
- Clinical Pharmacology Program, Division of Cardiology, Department of Medicine, University of California, San Francisco, California 94143, United States
| | - Neal L Benowitz
- Clinical Pharmacology Program, Division of Cardiology, Department of Medicine, University of California, San Francisco, California 94143, United States
| | - Dorothy K Hatsukami
- Department of Psychiatry and Behavioral Sciences and Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Christopher M Havel
- Clinical Pharmacology Program, Division of Cardiology, Department of Medicine, University of California, San Francisco, California 94143, United States
| | - Eduardo Lazcano-Ponce
- School of Public Health of Mexico, National Institute of Public Health, 62100 Cuernavaca, Morelos, Mexico
| | - Andrew A Strasser
- Tobacco Center of Regulatory Science, Department of Psychiatry and Abramson Cancer Center, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Peyton Jacob
- Clinical Pharmacology Program, Division of Cardiology, Department of Medicine, University of California, San Francisco, California 94143, United States
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Jurisch M, de Paula CCA, Augusti R. Distinguishing legal and illegal cigarettes by applying paper spray mass spectrometry and chemometric tools. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2020; 34:e8752. [PMID: 32059068 DOI: 10.1002/rcm.8752] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 02/11/2020] [Accepted: 02/12/2020] [Indexed: 06/10/2023]
Abstract
RATIONALE Smoking is responsible for one in five deaths around the world. Thus, governments have been trying to reduce the number of active smokers by increasing taxes on products. This scenario creates a new problem by raising the consumption of illegally traded cigarettes, which are often seized and analyzed by police forces. METHODS Legal and illegal cigarette samples were extracted and analyzed using paper spray ionization mass spectrometry (PS-MS). The mass spectrometer was set to operate in full-scan positive ion mode to yield representative chemical profiles of each sample. The results were used to build a chemometric model using partial least squares discriminant analysis (PLS-DA) to discriminate between both sets of samples, i.e. legal and illegal. RESULTS The PS-MS procedure was fast, simple and efficient, yielding high-quality and reproducible mass spectra with a very good signal-to-noise ratio. Even though all samples displayed visually indistinguishable mass spectra, the PS-MS data handled by the PLS-DA approach furnished a model that reached sample classification with rates of 100% and 80% for the training and validation sets, respectively. CONCLUSIONS A novel methodology was successfully developed associating the PS-MS technique with chemometric analysis to differentiate between legal and illegal cigarettes. The PS-MS technique proved to be adequate for obtaining fingerprints of such types of samples despite high complexity, and a PLS-DA model was successfully constructed achieving 82.1% accuracy.
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Affiliation(s)
- Marina Jurisch
- Departamento de Química, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | | | - Rodinei Augusti
- Departamento de Química, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
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Barbosa JMG, Pereira NZ, David LC, de Oliveira CG, Soares MFG, Avelino MAG, de Oliveira AE, Shokry E, Filho NRA. Cerumenogram: a new frontier in cancer diagnosis in humans. Sci Rep 2019; 9:11722. [PMID: 31409861 PMCID: PMC6692389 DOI: 10.1038/s41598-019-48121-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 07/22/2019] [Indexed: 02/07/2023] Open
Abstract
Cancer is the deadliest human disease and the development of new diagnosis methods is important to increase the chances of a cure. In this work it was developed a new method, named here for the first time as cerumenogram, using cerumen (earwax) as a new biomatrix for diagnosis. Earwax samples collected from cancer patients (cancer group) and cancer-free patients (control group) were analyzed by Headspace/Gas Chromatography-Mass Spectrometry (HS/GC-MS), following with multivariate analysis steps to process the raw data generated. In total, 158 volatile organic metabolites (VOMs) were identified in the cerumen samples. The 27 selected as potential VOMs biomarkers for cancer provided 100% discrimination between the cancer and control groups. This new test can thus be routinely employed for cancer diagnoses that is non-invasive, fast, cheap, and highly accurate.
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Affiliation(s)
- João Marcos Gonçalves Barbosa
- Laboratory of Extraction and Separation Methods (LAMES), Institute of Chemistry, Federal University of Goiás (UFG), Campus II - Samambaia, 74690-900, Goiânia, GO, Brazil.
| | - Naiara Zedes Pereira
- Laboratory of Extraction and Separation Methods (LAMES), Institute of Chemistry, Federal University of Goiás (UFG), Campus II - Samambaia, 74690-900, Goiânia, GO, Brazil
| | - Lurian Caetano David
- Laboratory of Extraction and Separation Methods (LAMES), Institute of Chemistry, Federal University of Goiás (UFG), Campus II - Samambaia, 74690-900, Goiânia, GO, Brazil
| | - Camilla Gabriela de Oliveira
- Clinical Hospital, Federal University of Goiás (UFG), Campus I - Colemar Natal e Silva, 74605-020, Goiânia, GO, Brazil
| | - Marina Ferraz Gontijo Soares
- Clinical Hospital, Federal University of Goiás (UFG), Campus I - Colemar Natal e Silva, 74605-020, Goiânia, GO, Brazil
| | - Melissa Ameloti Gomes Avelino
- Clinical Hospital, Federal University of Goiás (UFG), Campus I - Colemar Natal e Silva, 74605-020, Goiânia, GO, Brazil
| | - Anselmo Elcana de Oliveira
- Laboratory of Theoretical and Computational Chemistry (LQTC), Institute of Chemistry, Federal University of Goiás (UFG), Campus II - Samambaia, 74690-970, Goiânia, GO, Brazil
| | - Engy Shokry
- Laboratory of Extraction and Separation Methods (LAMES), Institute of Chemistry, Federal University of Goiás (UFG), Campus II - Samambaia, 74690-900, Goiânia, GO, Brazil
| | - Nelson Roberto Antoniosi Filho
- Laboratory of Extraction and Separation Methods (LAMES), Institute of Chemistry, Federal University of Goiás (UFG), Campus II - Samambaia, 74690-900, Goiânia, GO, Brazil. .,Laboratory of Extraction and Separation Methods (LAMES), Institute of Chemistry, Federal University of Goiás (UFG), Campus II - Samambaia, 74690-900, Goiânia, GO, Brazil.
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Mochalski P, Leja M, Gasenko E, Skapars R, Santare D, Sivins A, Aronsson DE, Ager C, Jaeschke C, Shani G, Mitrovics J, Mayhew CA, Haick H. Ex vivo emission of volatile organic compounds from gastric cancer and non-cancerous tissue. J Breath Res 2018; 12:046005. [PMID: 29893713 DOI: 10.1088/1752-7163/aacbfb] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The presence of certain volatile organic compounds (VOCs) in the breath of patients with gastric cancer has been reported by a number of research groups; however, the source of these compounds remains controversial. Comparison of VOCs emitted from gastric cancer tissue to those emitted from non-cancerous tissue would help in understanding which of the VOCs are associated with gastric cancer and provide a deeper knowledge on their generation. Gas chromatography with mass spectrometric detection (GC-MS) coupled with head-space needle trap extraction (HS-NTE) as the pre-concentration technique, was used to identify and quantify VOCs released by gastric cancer and non-cancerous tissue samples collected from 41 patients during surgery. Excluding contaminants, a total of 32 VOCs were liberated by the tissue samples. The emission of four of them (carbon disulfide, pyridine, 3-methyl-2-butanone and 2-pentanone) was significantly higher from cancer tissue, whereas three compounds (isoprene, γ-butyrolactone and dimethyl sulfide) were in greater concentration from the non-cancerous tissues (Wilcoxon signed-rank test, p < 0.05). Furthermore, the levels of three VOCs (2-methyl-1-propene, 2-propenenitrile and pyrrole) were correlated with the occurrence of H. pylori; and four compounds (acetonitrile, pyridine, toluene and 3-methylpyridine) were associated with tobacco smoking. Ex vivo analysis of VOCs emitted by human tissue samples provides a unique opportunity to identify chemical patterns associated with a cancerous state and can be considered as a complementary source of information on volatile biomarkers found in breath, blood or urine.
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Affiliation(s)
- Pawel Mochalski
- Institute for Breath Research, University of Innsbruck, Rathausplatz 4, A-6850 Dornbirn, Austria. Institute of Chemistry, Jan Kochanowski University, Świętokrzyska 15G, PL-25406 Kielce, Poland
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Kibet J, Kurgat C, Limo S, Rono N, Bosire J. Kinetic modeling of nicotine in mainstream cigarette smoking. Chem Cent J 2016. [PMID: 27790285 DOI: 10.1186/s13065-016-0206-8.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The attempt to understand the kinetic behavior of nicotine in tobacco will provide a basis for unraveling its energetics in tobacco burning and the formation of free radicals considered harmful to the cigarette smoking community. To the best of our knowledge, the high temperature destruction kinetic characteristics of nicotine have not been investigated before; hence this study is necessary especially at a time addiction science and tobacco research in general is gaining intense attention. METHODS The pyrolysis of tobacco under conditions simulating cigarette smoking in the temperature region 200-700 °C has been investigated for the evolution of nicotine and pyridine from two commercial cigarettes coded ES1 and SM1 using gas chromatography hyphenated to a mass selective detector (MSD). Moreover, a kinetic model on the thermal destruction of nicotine within a temperature window of 673 and 973 K is proposed using pseudo-first order reaction kinetics. A reaction time of 2.0 s was employed in line with the average puff time in cigarette smoking. Nonetheless, various reaction times were considered for the formation kinetics of nicotine. RESULTS GC-MS results showed the amount of nicotine evolved decreased with increase in the puff time. This observation was remarkably consistent with UV-Vis data reported in this investigation. Generally, the temperature dependent rate constants for the destruction of nicotine were found to be [Formula: see text] s-1 and [Formula: see text] s-1 for ES1 and SM1 cigarettes respectively. In addition, the amount of nicotine evolved by ES1 cigarette was ~10 times more than the amount of nicotine released by SM1 cigarette. CONCLUSION The suggested mechanistic model for the formation of pyridine from the thermal degradation of nicotine in tobacco has been found to be agreement with the kinetic model proposed in this investigation. Consequently, the concentration of radical intermediates of tobacco smoke such as pyridinyl radical can be determined indirectly from a set of integrated rate laws. This study has also shown that different cigarettes can yield varying amounts of nicotine and pyridine depending on the type of cigarette primarily because of potential different growing conditions and additives introduced during tobacco processing. The activation energy of nicotine articulated in this work is consistent with that reported in literature.Graphical abstractThe anatomy of tobacco cigarette and the major chemistry involved during combustion (pyrolysis, GC-MS analysis, and kinetic modeling).
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Affiliation(s)
- Joshua Kibet
- Department of Chemistry, Egerton University, P.O Box 536, Egerton, 20115 Kenya
| | - Caren Kurgat
- Department of Chemistry, Egerton University, P.O Box 536, Egerton, 20115 Kenya
| | - Samuel Limo
- Department of Physics, University of Eldoret, P.O Box 1125, Eldoret, 30100 Kenya
| | - Nicholas Rono
- Department of Chemistry, Egerton University, P.O Box 536, Egerton, 20115 Kenya
| | - Josephate Bosire
- Department of Chemistry, Egerton University, P.O Box 536, Egerton, 20115 Kenya
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7
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Kibet J, Kurgat C, Limo S, Rono N, Bosire J. Kinetic modeling of nicotine in mainstream cigarette smoking. Chem Cent J 2016; 10:60. [PMID: 27790285 PMCID: PMC5062895 DOI: 10.1186/s13065-016-0206-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Accepted: 10/04/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The attempt to understand the kinetic behavior of nicotine in tobacco will provide a basis for unraveling its energetics in tobacco burning and the formation of free radicals considered harmful to the cigarette smoking community. To the best of our knowledge, the high temperature destruction kinetic characteristics of nicotine have not been investigated before; hence this study is necessary especially at a time addiction science and tobacco research in general is gaining intense attention. METHODS The pyrolysis of tobacco under conditions simulating cigarette smoking in the temperature region 200-700 °C has been investigated for the evolution of nicotine and pyridine from two commercial cigarettes coded ES1 and SM1 using gas chromatography hyphenated to a mass selective detector (MSD). Moreover, a kinetic model on the thermal destruction of nicotine within a temperature window of 673 and 973 K is proposed using pseudo-first order reaction kinetics. A reaction time of 2.0 s was employed in line with the average puff time in cigarette smoking. Nonetheless, various reaction times were considered for the formation kinetics of nicotine. RESULTS GC-MS results showed the amount of nicotine evolved decreased with increase in the puff time. This observation was remarkably consistent with UV-Vis data reported in this investigation. Generally, the temperature dependent rate constants for the destruction of nicotine were found to be [Formula: see text] s-1 and [Formula: see text] s-1 for ES1 and SM1 cigarettes respectively. In addition, the amount of nicotine evolved by ES1 cigarette was ~10 times more than the amount of nicotine released by SM1 cigarette. CONCLUSION The suggested mechanistic model for the formation of pyridine from the thermal degradation of nicotine in tobacco has been found to be agreement with the kinetic model proposed in this investigation. Consequently, the concentration of radical intermediates of tobacco smoke such as pyridinyl radical can be determined indirectly from a set of integrated rate laws. This study has also shown that different cigarettes can yield varying amounts of nicotine and pyridine depending on the type of cigarette primarily because of potential different growing conditions and additives introduced during tobacco processing. The activation energy of nicotine articulated in this work is consistent with that reported in literature.Graphical abstractThe anatomy of tobacco cigarette and the major chemistry involved during combustion (pyrolysis, GC-MS analysis, and kinetic modeling).
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Affiliation(s)
- Joshua Kibet
- Department of Chemistry, Egerton University, P.O Box 536, Egerton, 20115 Kenya
| | - Caren Kurgat
- Department of Chemistry, Egerton University, P.O Box 536, Egerton, 20115 Kenya
| | - Samuel Limo
- Department of Physics, University of Eldoret, P.O Box 1125, Eldoret, 30100 Kenya
| | - Nicholas Rono
- Department of Chemistry, Egerton University, P.O Box 536, Egerton, 20115 Kenya
| | - Josephate Bosire
- Department of Chemistry, Egerton University, P.O Box 536, Egerton, 20115 Kenya
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8
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Monitoring of pyridine, 3-picoline and quinoline in smokers’ urine using ultrasound-assisted emulsification microextraction coupled with high-performance liquid chromatography. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2015. [DOI: 10.1007/s13738-015-0650-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Brokl M, Bishop L, Wright CG, Liu C, McAdam K, Focant JF. Multivariate analysis of mainstream tobacco smoke particulate phase by headspace solid-phase micro extraction coupled with comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry. J Chromatogr A 2014; 1370:216-29. [PMID: 25454146 DOI: 10.1016/j.chroma.2014.10.057] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Revised: 10/16/2014] [Accepted: 10/18/2014] [Indexed: 11/24/2022]
Abstract
A method involving headspace solid-phase microextraction (HS-SPME) and comprehensive two-dimensional gas chromatography (GC×GC) coupled to time-of-flight mass spectrometry (TOFMS) was developed and applied to evaluate profiles of volatile compounds present in mainstream tobacco smoke particulate matter trapped on glass fiber filters. Six SPME fibers were tested for the extraction capacities toward selected compounds, showing the best results for the polyacrylate fiber. The optimization of the extraction conditions was carried out using multivariate response surface methodology. Two cigarette types differing in a filter design were analyzed using optimized conditions. A template was built in order to generate comprehensive chemical information, which conceded obtaining consistent information across 24 chromatograms. Principal component analysis (PCA) allowed a clear differentiation of the studied cigarette types. Fisher ratio analysis allowed identification of compounds responsible for the chemical differences between the cigarette samples. Of the selected 143 most important ones, 134 analytes were reduced by the active carbon filter, while for nine, classical cellulose acetate filter was more efficient.
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Affiliation(s)
- Michał Brokl
- CART - Chemistry Department, Organic & Biological Analytical Chemistry, University of Liège, Liège, Belgium
| | - Louise Bishop
- Group Research and Development, British American Tobacco, Regents Park Road, Southampton SO15 8TL, UK
| | - Christopher G Wright
- Group Research and Development, British American Tobacco, Regents Park Road, Southampton SO15 8TL, UK
| | - Chuan Liu
- Group Research and Development, British American Tobacco, Regents Park Road, Southampton SO15 8TL, UK
| | - Kevin McAdam
- Group Research and Development, British American Tobacco, Regents Park Road, Southampton SO15 8TL, UK
| | - Jean-François Focant
- CART - Chemistry Department, Organic & Biological Analytical Chemistry, University of Liège, Liège, Belgium.
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Mansoor S, Gupta N, Falatoonzadeh P, Kuppermann BD, Kenney MC. 2-ethylpyridine, a cigarette smoke component, causes mitochondrial damage in human retinal pigment epithelial cells in vitro. Indian J Ophthalmol 2014; 62:16-22. [PMID: 24492497 PMCID: PMC3955065 DOI: 10.4103/0301-4738.126168] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Purpose: Our goal was to identify the cellular and molecular effects of 2-ethylpyridine (2-EP, a component of cigarette smoke) on human retinal pigment epithelial cells (ARPE-19) in vitro. Materials and Methods: ARPE-19 cells were exposed to varying concentrations of 2-EP. Cell viability (CV) was measured by a trypan blue dye exclusion assay. Caspase-3/7 and caspase-9 activities were measured by fluorochrome assays. The production of reactive oxygen/nitrogen species (ROS/RNS) was detected with a 2’,7’-dichlorodihydrofluorescein diacetate dye assay. The JC-1 assay was used to measure mitochondrial membrane potential (ΔΨm). Mitochondrial redox potential was measured using a RedoxSensor Red kit and mitochondria were evaluated with Mitotracker dye. Results: After 2-EP exposure, ARPE-19 cells showed significantly decreased CV, increased caspase-3/7 and caspase-9 activities, elevated ROS/RNS levels, decreased ΔΨm value and decreased redox fluorescence when compared with control samples. Conclusions: These results show that 2-EP treatment induced cell death by caspase-dependent apoptosis associated with an oxidative stress and mitochondrial dysfunction. These data represent a possible mechanism by which smoking contributes to age-related macular degeneration and other retinal diseases and identify mitochondria as a target for future therapeutic interventions.
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Affiliation(s)
| | | | | | | | - M C Kenney
- Gavin Herbert Eye Institute, School of Medicine; Department of Pathology and Laboratory Medicine, University of California Irvine, Irvine, CA, USA,
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11
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Nanoclusters formation in ion mobility spectrometry and change separation selectivity of picoline isomers. ACTA ACUST UNITED AC 2014. [DOI: 10.1007/s12127-014-0157-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Arjomandi-Behzad L, Yamini Y, Rezazadeh M. Extraction of pyridine derivatives from human urine using electromembrane extraction coupled to dispersive liquid–liquid microextraction followed by gas chromatography determination. Talanta 2014; 126:73-81. [DOI: 10.1016/j.talanta.2014.02.066] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Revised: 02/23/2014] [Accepted: 02/25/2014] [Indexed: 10/25/2022]
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13
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Electrical field-stimulated liquid-phase microextraction for trace analysis of pyridine and its derivatives in cigarette extract. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2014. [DOI: 10.1007/s13738-014-0507-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Brokl M, Bishop L, Wright CG, Liu C, McAdam K, Focant JF. Analysis of mainstream tobacco smoke particulate phase using comprehensive two-dimensional gas chromatography time-of-flight mass spectrometry. J Sep Sci 2013; 36:1037-44. [PMID: 23427113 DOI: 10.1002/jssc.201200812] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2012] [Revised: 12/14/2012] [Accepted: 12/19/2012] [Indexed: 11/10/2022]
Abstract
Comprehensive 2D GC coupled to time-of-flight mass spectrometry was applied for the characterization of the particulate phase of mainstream tobacco smoke particulate. Five 3R4F research cigarettes were smoked on a rotary smoking machine under standardized conditions, total particular matter was collected on Cambridge filter pads and extracted using methanol-based liquid extraction and dynamic headspace (DHS) approaches. Automated peak finding and mass spectral deconvolution combined with scripting and manual revision of library hits were used to evaluate the library search results. The revised peak table contained nearly 1800 individual compounds for the DHS sample and over 900 for the solvent extracted sample. These methods of extraction were shown to be complementary, leading to only 11% of repeated analytes, and their combination gave rise to a list of almost 2500 individual compounds.
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Affiliation(s)
- Michał Brokl
- CART-Chemistry Department, Organic & Biological Analytical Chemistry, University of Liège, Liège, Belgium
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15
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Pirsa S, Alizadeh N. Rapid determination of pyridine derivatives by dispersive liquid-liquid microextraction coupled with gas chromatography/gas sensor based on nanostructured conducting polypyrrole. Talanta 2011; 87:249-54. [PMID: 22099675 DOI: 10.1016/j.talanta.2011.10.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2011] [Revised: 09/29/2011] [Accepted: 10/04/2011] [Indexed: 11/15/2022]
Abstract
Polypyrrole (PPy) gas sensor has been prepared by polymerization of pyrrole on surfaces of commercial polymer fibers in the presence of an oxidizing agent. The sensing behavior of PPy gas sensor was investigated in the presence of pyridine derivatives. The resistive responses of the PPy gas sensor to pyridine derivatives were in the order of quinoline>pyridine>4-methyl pyridine and 2-methyl pyridine. The PPy gas sensor was used as gas chromatography (GC) detector and exhibited linear responses to pyridine derivatives in the ranges 40-4,000 ng. Dispersive liquid-liquid microextraction (DLLME) combined with GC/PPy gas sensor has been developed for simultaneous determination of pyridine derivatives and quinoline. The purposed method was used for determination of pyridine derivatives from cigarette smoke. The GC runs were completed in 4 min. The reproducibility of this method is suitable and good standard deviations were obtained. RSD value is less than 10% for all analytes.
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Affiliation(s)
- Sajad Pirsa
- Department of Chemistry, Factually of Science, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran
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Saha S, Mistri R, Ray B. Determination of pyridine, 2-picoline, 4-picoline and quinoline from mainstream cigarette smoke by solid-phase extraction liquid chromatography/electrospray ionization tandem mass spectrometry. J Chromatogr A 2010; 1217:307-11. [DOI: 10.1016/j.chroma.2009.11.050] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2009] [Revised: 11/03/2009] [Accepted: 11/17/2009] [Indexed: 11/24/2022]
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17
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Scian MJ, Oldham MJ, Miller JH, Kane DB, Edmiston JS, McKinney WJ. Chemical analysis of cigarette smoke particulate generated in the MSB-01 in vitro whole smoke exposure system. Inhal Toxicol 2009; 21:1040-52. [PMID: 19772483 DOI: 10.1080/08958370802712705] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Cigarette mainstream smoke (MS) is a dynamic aerosol consisting of a gas-vapor phase and a particulate phase. In recent years, novel in vitro whole smoke exposure systems have been developed to expose cells directly to whole MS. One such system is the Burghart Mimic Smoker-01 (MSB-01). Our previous data using the MSB-01 indicated that a 50 +/- 10% loss of particulate matter occurred prior to MS delivery into the exposure chamber. Additionally, a change in aerosol particle diameter was also measured, suggesting that the chemical composition of MS might be changing within the system. In this study, we have expanded on our previous work and compared the particulate phase chemical composition of undiluted and diluted MS generated by the instrument and that of the MS delivered into the exposure chamber. The average percent delivery of cigarette smoke condensate (CSC) detected for all the measured chemical constituents was 35 +/- 13% for undiluted MS and 23 +/- 8% for 1:1 diluted MS. The data also indicate that under our experimental conditions, incomplete mixing of the freshly generated MS occurs during its dilution by the system. Taken together, the data presented here show that significant chemical changes occur between the generation of MS by the system and its delivery into the exposure chamber. This indicates that due to the dynamic nature of cigarette smoke, it is important to characterize the exposure conditions in order to gain the best insight and accurately correlate exposure with biological endpoints.
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Affiliation(s)
- Mariano J Scian
- Rem X Speciality Staffing, c/o Altria Client Services, Richmond, VA, USA
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18
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Ye Q. Development of solid-phase microextraction followed by gas chromatography-mass spectrometry for rapid analysis of volatile organic chemicals in mainstream cigarette smoke. J Chromatogr A 2008; 1213:239-44. [PMID: 18992893 DOI: 10.1016/j.chroma.2008.10.063] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2008] [Revised: 10/09/2008] [Accepted: 10/14/2008] [Indexed: 11/30/2022]
Abstract
In this work, a novel, simple and efficient method based on solid-phase microextraction (SPME) followed by gas chromatography-mass spectrometry (GC-MS) was developed to the analysis of volatile organic chemicals (VOCs) in mainstream cigarette smoke (MCS). Using a simple home-made smoking machine device, extraction and concentration of VOCs in MCS were performed by SPME fiber, and the VOCs adsorbed on fiber were desorbed, and analyzed by GC-MS. The extraction fiber types and the desorption conditions were studied, and the method precision was also investigated. After the investigation, the optimal fiber was divinylbenzene/carboxen/polydemethylsiloxane (DVB/CAR/PDMS), and the optimal desorption condition was 250 degrees C for 3 min. The method precision was from 2% to 11%. Finally, the proposed method was tested by its application of the analysis of VOCs in MCS from 10 brands of cigarettes and one reference cigarette. A total of 70 volatile compounds were identified by the proposed method. The experimental results showed that the proposed method was a simple, rapid, reliable, and solvent-free technique for the determination of VOCs in MCS.
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Affiliation(s)
- Qing Ye
- Department of Chemistry, Shangrao Normal University, Shangrao 334001, Province of Jiangxi, China.
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Chou SL, Ling YC, Yang MH, Pai CY. Determination of Δ9-tetrahydrocannabinol in indoor air as an indicator of marijuana cigarette smoking using adsorbent sampling and in-injector thermal desorption gas chromatography–mass spectrometry. Anal Chim Acta 2007; 598:103-9. [PMID: 17693313 DOI: 10.1016/j.aca.2007.07.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2007] [Revised: 06/17/2007] [Accepted: 07/04/2007] [Indexed: 11/21/2022]
Abstract
The marijuana leaves are usually mixed with tobaccos and smoked at amusement places in Taiwan. Recently, for investigation-legal purposes, the police asked if we can identify the marijuana smoke in a KTV stateroom (a private room at the entertainment spot for singing, smoking, alcohol drinking, etc.) without marijuana residues. A personal air-sampler pump fitted with the GC liner-tube packed with Tenax-TA adsorbent was used for air sampling. The GC-adsorbent tube was placed in the GC injector port and desorbed directly, followed by GC-MS analysis for the determination of delta9-tetrahydrocannabinol (delta9-THC) in indoor air. The average desorption efficiency and limit of detection for delta9-THC were 89% and 0.1 microg m(-3), respectively, approximately needing 1.09 mg of marijuana leaves smoked in an unventilated closed room (3.0 m x 2.4 m x 2.7 m) to reach this level. The mean delta9-THC contained in the 15 marijuana plants seized from diverse locations was measured to be 0.32%. The delta9-THC in room air can be successfully identified from mock marijuana cigarettes, mixtures of marijuana and tobacco, and an actual case. The characteristic delta9-THC peak in chromatogram can serve as the indicator of marijuana. Positive result suggests marijuana smoking at the specific scene in the recent past, facilitating the formulation of further investigation.
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Affiliation(s)
- Su-Lien Chou
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu 30013, Taiwan, ROC
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Comparison of simultaneous distillation extraction and solid-phase micro-extraction for determination of volatile constituents in tobacco flavor. ACTA ACUST UNITED AC 2005. [DOI: 10.1007/s11771-005-0120-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Lu X, Zhao M, Kong H, Cai J, Wu J, Wu M, Hua R, Liu J, Xu G. Characterization of cigarette smoke condensates by comprehensive two-dimensional gas chromatography/time-of-flight mass spectrometry (GC×GC/TOFMS) Part 2: Basic fraction. J Sep Sci 2003; 27:101-9. [PMID: 15335065 DOI: 10.1002/jssc.200301659] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Cigarette smoke condensate is a complex chemical matrix. Analysis of nitrogen-containing compounds present therein is very difficult because of the limitation of the peak capacity of conventional one-dimensional chromatography. Extensive and laborious sample preparation is frequently required or selective detectors are frequently used. In this study, the basic fraction of mainstream cigarette smoke condensate has been investigated by using comprehensive two-dimensional gas chromatography/time-of-flight mass spectrometry (GC x GC/TOFMS). Auto data processing by TOFMS software combined with manual identification was used to assign the components. 377 nitrogen-containing compounds, including 155 pyridine derivatives, 104 quinoline/isoquinoine derivatives, and 56 pyrazine derivatives were tentatively identified. By selecting appropriate unique masses and in the light of the component positions in the structured chromatogram, alkyl-substituted pyridines, pyrazines, and quinolines/isoquinolines were separately shown and further validated. The peaks of eight individual positional isomers of two-carbon-substituted pyridines and thirteen positional isomers of methyl-substituted quinolines/isoquinolines were further confirmed, based on linear incremental retention behavior in combination with TOFMS and the structured chromatogram of GC x GC.
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Affiliation(s)
- Xin Lu
- National Chromatographic R & A Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116011, China
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Current awareness in phytochemical analysis. PHYTOCHEMICAL ANALYSIS : PCA 2003; 14:267-274. [PMID: 12971402 DOI: 10.1002/pca.679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
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