gas chromatography

Summary

Summary: Fractionation of a vaporized sample as a consequence of partition between a mobile gaseous phase and a stationary phase held in a column. Two types are gas-solid chromatography, where the fixed phase is a solid, and gas-liquid, in which the stationary phase is a nonvolatile liquid supported on an inert solid matrix.

Top Publications

  1. ncbi Application of a new method for analysis of exhaled gas in critically ill patients
    J K Schubert
    Department of Anaesthesiology and Intensive Care Medicine, University Hospital of Freiburg, Germany
    Intensive Care Med 24:415-21. 1998
  2. ncbi Natural odor ligands for olfactory receptor neurons of the female mosquito Aedes aegypti: use of gas chromatography-linked single sensillum recordings
    Majid Ghaninia
    SLU, Department of Plant Protection Biology, 230 53 Alnarp, Sweden
    J Exp Biol 211:3020-7. 2008
  3. ncbi Identification of uncommon plant metabolites based on calculation of elemental compositions using gas chromatography and quadrupole mass spectrometry
    O Fiehn
    Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany
    Anal Chem 72:3573-80. 2000
  4. ncbi Matrix-induced response enhancement in pesticide residue analysis by gas chromatography
    Colin F Poole
    Department of Chemistry, Room 183, Wayne State University, Detroit, MI 48202, USA
    J Chromatogr A 1158:241-50. 2007
  5. ncbi Identification of character-impact odorants in coriander and wild coriander leaves using gas chromatography-olfactometry (GCO) and comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry (GC x GC-TOFMS)
    Graham Eyres
    Department of Food Science, University of Otago, PO Box 56, Dunedin, New Zealand
    J Sep Sci 28:1061-74. 2005
  6. ncbi Aromatic profile of aqueous banana essence and banana fruit by gas chromatography-mass spectrometry (GC-MS) and gas chromatography-olfactometry (GC-O)
    M J Jordan
    U S Citrus and Subtropical Products Laboratory, Agricultural Research Service, U S Department of Agriculture, 600 Avenue S, N W, Winter Haven, Florida 33881, USA
    J Agric Food Chem 49:4813-7. 2001
  7. ncbi Prediction of the wine sensory properties related to grape variety from dynamic-headspace gas chromatography-olfactometry data
    Eva Campo
    Department of Analytical Chemistry, Science Faculty, Universidad de Zaragoza, 50009 Zaragoza, Spain
    J Agric Food Chem 53:5682-90. 2005
  8. ncbi Characterization of volatile compounds in chilled cod (Gadus morhua) fillets by gas chromatography and detection of quality indicators by an electronic nose
    Gudrun Olafsdottir
    Icelandic Fisheries Laboratories, Skulagata 4, 101 Reykjavik, Iceland
    J Agric Food Chem 53:10140-7. 2005
  9. ncbi Analysis of 4-aminobiphenyl hemoglobin adducts in smokers and nonsmokers by pseudo capillary on-column gas chromatography- tandem mass spectrometry
    Tiffany H Seyler
    Emergency Response and Air Toxicants Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA
    J Anal Toxicol 34:304-11. 2010
  10. ncbi Human pharmacokinetics of a perfluorocarbon ultrasound contrast agent evaluated with gas chromatography
    J M Correas
    Department of Radiology, University Hospital of Necker, Paris, France
    Ultrasound Med Biol 27:565-70. 2001

Research Grants

Detail Information

Publications305 found, 100 shown here

  1. ncbi Application of a new method for analysis of exhaled gas in critically ill patients
    J K Schubert
    Department of Anaesthesiology and Intensive Care Medicine, University Hospital of Freiburg, Germany
    Intensive Care Med 24:415-21. 1998
    ..Application of a new method for analysis of exhaled gas in critically ill patients...
  2. ncbi Natural odor ligands for olfactory receptor neurons of the female mosquito Aedes aegypti: use of gas chromatography-linked single sensillum recordings
    Majid Ghaninia
    SLU, Department of Plant Protection Biology, 230 53 Alnarp, Sweden
    J Exp Biol 211:3020-7. 2008
    ..In the present study, we have, for the first time, conducted gas chromatography-coupled single sensillum recordings (GC-SSR) from antennal trichoid and intermediate sensilla of female Ae...
  3. ncbi Identification of uncommon plant metabolites based on calculation of elemental compositions using gas chromatography and quadrupole mass spectrometry
    O Fiehn
    Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany
    Anal Chem 72:3573-80. 2000
    ..crude leaf extracts were identified on the basis of calculations of elemental compositions obtained from gas chromatography/low-resolution quadrupole mass spectrometric data...
  4. ncbi Matrix-induced response enhancement in pesticide residue analysis by gas chromatography
    Colin F Poole
    Department of Chemistry, Room 183, Wayne State University, Detroit, MI 48202, USA
    J Chromatogr A 1158:241-50. 2007
    ..The different approaches for correcting matrix-induced enhancement for calibration in pesticide residue analysis are discussed and compared in this review...
  5. ncbi Identification of character-impact odorants in coriander and wild coriander leaves using gas chromatography-olfactometry (GCO) and comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry (GC x GC-TOFMS)
    Graham Eyres
    Department of Food Science, University of Otago, PO Box 56, Dunedin, New Zealand
    J Sep Sci 28:1061-74. 2005
    ..The aroma profiles were characterised using gas chromatography-olfactometry (GCO) and CharmAnalysis...
  6. ncbi Aromatic profile of aqueous banana essence and banana fruit by gas chromatography-mass spectrometry (GC-MS) and gas chromatography-olfactometry (GC-O)
    M J Jordan
    U S Citrus and Subtropical Products Laboratory, Agricultural Research Service, U S Department of Agriculture, 600 Avenue S, N W, Winter Haven, Florida 33881, USA
    J Agric Food Chem 49:4813-7. 2001
    b>Gas chromatography-mass spectrometry (GC-MS) and gas chromatography-olfactometry (GC-O) were used to determine the aromatic composition and aroma active components of commercial banana essence and fresh banana fruit paste...
  7. ncbi Prediction of the wine sensory properties related to grape variety from dynamic-headspace gas chromatography-olfactometry data
    Eva Campo
    Department of Analytical Chemistry, Science Faculty, Universidad de Zaragoza, 50009 Zaragoza, Spain
    J Agric Food Chem 53:5682-90. 2005
    Wine extracts obtained by a dynamic headspace sampling technique were studied by quantitative gas chromatography-olfactometry (GC-O) to determine the aroma profiles of six young monovarietal Spanish white wines...
  8. ncbi Characterization of volatile compounds in chilled cod (Gadus morhua) fillets by gas chromatography and detection of quality indicators by an electronic nose
    Gudrun Olafsdottir
    Icelandic Fisheries Laboratories, Skulagata 4, 101 Reykjavik, Iceland
    J Agric Food Chem 53:10140-7. 2005
    ..5 degrees C) by gas chromatography (GC)-mass spectrometry and GC-olfactometry to screen potential quality indicators present in concentrations ..
  9. ncbi Analysis of 4-aminobiphenyl hemoglobin adducts in smokers and nonsmokers by pseudo capillary on-column gas chromatography- tandem mass spectrometry
    Tiffany H Seyler
    Emergency Response and Air Toxicants Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA
    J Anal Toxicol 34:304-11. 2010
    ..2-aminonaphthylene, and 3- and 4-aminobiphenyl hemoglobin adducts in human blood using capillary gas chromatography-tandem mass spectrometry...
  10. ncbi Human pharmacokinetics of a perfluorocarbon ultrasound contrast agent evaluated with gas chromatography
    J M Correas
    Department of Radiology, University Hospital of Necker, Paris, France
    Ultrasound Med Biol 27:565-70. 2001
    ..It was concluded that DDFP pharmacokinetics in blood fitted to an open one-compartment model with a fast elimination half-life. Recovery in expired air was almost complete 2 h after administration...
  11. ncbi Comparison of various detection limit estimates for volatile sulphur compounds by gas chromatography with pulsed flame photometric detection
    Lionel J J Catalan
    Department of Chemical Engineering, Lakehead University, Thunder Bay, Ont, Canada
    J Chromatogr A 1136:89-98. 2006
    ..regarding the definition, determination, and reporting of detection limits for volatile sulphur compounds by gas chromatography with pulsed flame photometric detection (GC-PFPD)...
  12. pmc In vitro kinetics of prebiotic inulin-type fructan fermentation by butyrate-producing colon bacteria: implementation of online gas chromatography for quantitative analysis of carbon dioxide and hydrogen gas production
    Gwen Falony
    Research Group of Industrial Microbiology and Food Biotechnology, Vrije Universiteit Brussel, Pleinlaan 2, B 1050 Brussels, Belgium
    Appl Environ Microbiol 75:5884-92. 2009
    ..A gas chromatography method was set up to assess H2 and CO2 production online and to ensure complete coverage of all metabolites ..
  13. ncbi Method for small-molecule discovery based on microscale-preparative multidimensional gas chromatography isolation with nuclear magnetic resonance spectroscopy
    Graham T Eyres
    Australian Centre for Research on Separation Science, School of Applied Sciences, RMIT University, G P O Box 2476V, Melbourne, Victoria 3001, Australia
    Anal Chem 80:6293-9. 2008
    ..Here, a novel preparative technique based upon capillary column multidimensional gas chromatography (MDGC) with 2D NMR to resolve, isolate, and identify pure volatile components from a complex sample is ..
  14. ncbi Application of microscale-preparative multidimensional gas chromatography with nuclear magnetic resonance spectroscopy for identification of pure methylnaphthalenes from crude oils
    Graham T Eyres
    Australian Centre for Research on Separation Science ACROSS, School of Applied Sciences, RMIT University, GPO Box 2476V, Melbourne, Victoria 3001, Australia
    J Chromatogr A 1215:168-76. 2008
    ..Here, a novel preparative technique based upon capillary multidimensional gas chromatography to isolate pure volatile components from complex samples is described...
  15. ncbi Validation of a rapid measure of blood PUFA levels in humans
    Eileen Bailey-Hall
    Martek Biosciences Corporation, Columbia, MD 21045, USA
    Lipids 43:181-6. 2008
    ..31-0.41, respectively). Results indicate that the described finger stick assay represents a fast, reliable method to measure specific LC-PUFA levels...
  16. ncbi Use of gas chromatography-olfactometry to identify key odorant compounds in dark chocolate. Comparison of samples before and after conching
    Christine Counet
    Unite de Brasserie et des Industries Alimentaires, Universite Catholique de Louvain, Croix du Sud, 2 Bte7, B 1348 Louvain la Neuve, Belgium
    J Agric Food Chem 50:2385-91. 2002
    ..vacuum distillation and liquid-liquid extraction, the volatile fractions of dark chocolates were analyzed by gas chromatography-olfactometry and gas chromatography-mass spectrometry...
  17. ncbi A method for the direct evaluation of the fatty acid status in a drop of blood from a fingertip in humans: applicability to nutritional and epidemiological studies
    Franca Marangoni
    Department of Pharmacological Sciences, University of Milan, 20133 Milan, Italy
    Anal Biochem 326:267-72. 2004
    ..Drops of blood collected from fingertips have been directly subjected to transmethylation for gas chromatography analysis...
  18. pmc Primary structure of the ovine hypothalamic luteinizing hormone-releasing factor (LRF) (LH-hypothalamus-LRF-gas chromatography-mass spectrometry-decapeptide-Edman degradation)
    R Burgus
    Proc Natl Acad Sci U S A 69:278-82. 1972
    ..The synthetic decapeptide possesses the same biological activities as the native ovine LRF. The amino-acid sequence of ovine LRF is identical to that already published for porcine LRF...
  19. ncbi Headspace liquid-phase microextraction of chlorobenzenes in soil with gas chromatography-electron capture detection
    Gang Shen
    Department of Chemistry, National University of Singapore, 3 Science Drive 3, Republic of Singapore 117543
    Anal Chem 75:98-103. 2003
    ..Repeatabilitywas between 5.7 and 17.7%, and the limits of detection were 6-14 ng/g. HS-LPME was shown to be an inexpensive, fast, and simple sample preparation method for volatile compounds...
  20. ncbi Simultaneous identification and quantitation of 11 flavonoid constituents in Kaempferia parviflora by gas chromatography
    K Sutthanut
    Center for Research and Development of Herbal Health Products, Khon Kaen University, Khon Kaen, Thailand
    J Chromatogr A 1143:227-33. 2007
    ..This method is expected to be useful in the quantitative and qualitative analyses of the flavonoid content of KD samples and as a quality control assessment of KD raw materials and products...
  21. ncbi Rapid determination of short-chain fatty acids in colonic contents and faeces of humans and rats by acidified water-extraction and direct-injection gas chromatography
    Guohua Zhao
    Applied Nutrition and Food Chemistry, Center for Chemistry and Chemical Engineering, Lund University, PO Box 124, SE 221 00 Lund, Sweden
    Biomed Chromatogr 20:674-82. 2006
    ..After validation, the methodology was applied on two faecal samples from rats fed diets containing different amount of dietary fibre and one faecal sample from human fed a normal diet to test the accuracy of the developed method...
  22. ncbi Development of a compact and simple gas chromatography for oral malodor measurement
    Takatoshi Murata
    Department of Oral Health, Nippon Dental University, Tokyo, Japan
    J Periodontol 77:1142-7. 2006
    ..We have assessed the correlation between measurements with a GC-SCS and those with a regular GC...
  23. ncbi Solid-phase microextraction and gas chromatography olfactometry analysis of successively diluted samples. A new approach of the aroma extract dilution analysis applied to the characterization of wine aroma
    Maria Pilar Martí
    Departament de Quimica Analitica i Quimica Organica, Universitat Rovira i Virgili, Avenida Ramón y Cajal 70, E 43005 Tarragona, Spain
    J Agric Food Chem 51:7861-5. 2003
    The relationship between the composition and the aroma of the wine can be established by using gas chromatography with olfactometric detection (sniffing or GCO), which combines the chromatographic response with the human nose response...
  24. ncbi Quantitative comparison of performance of isothermal and temperature-programmed gas chromatography
    L M Blumberg
    Fast GC Consulting, P O Box 585, Hockessin, DE 19707, USA
    J Chromatogr A 933:13-26. 2001
    As a basic metric of separation for comparing isothermal and temperature-programmed GC (gas chromatography), we used the separation measure. S (defined elsewhere)...
  25. ncbi Determination of selected polychlorinated biphenyls in water samples by ultrasound-assisted emulsification-microextraction and gas chromatography-mass-selective detection
    Senar Ozcan
    Selcuk University, Department of Environmental Engineering, Campus, 42031 Konya, Turkey
    Anal Chim Acta 647:182-8. 2009
    ..developed for the determination of selected polychlorinated biphenyls (PCBs) in 10 mL of water samples by gas chromatography-mass-selective detection...
  26. ncbi Determination of residues of endosulfan and five pyrethroid insecticides in virgin olive oil using gas chromatography with electron-capture detection
    C Lentza-Rizos
    National Agricultural Research Foundation, Athens, Greece
    J Chromatogr A 921:297-304. 2001
    ..Sep-Pak alumina-N column cleanup after a liquid-liquid extraction or low-temperature precipitation step, and gas chromatography (GC) with electron-capture detection. The matrix effect was assessed for the GC systems used...
  27. ncbi Acoustic methods of detection in gas chromatography
    Christine Mah
    Department of Chemistry, University of Calgary, Calgary, AB, Canada
    J Sep Sci 29:1922-30. 2006
    ..Of the two major classifications, reports of active methods are far more prevalent. In particular, the usage of SAW techniques with GC is an area of research that has seen accelerated growth in recent years...
  28. ncbi The chemical characterization of the aroma of dessert and sparkling white wines (Pedro Ximénez, Fino, Sauternes, and Cava) by gas chromatography-olfactometry and chemical quantitative analysis
    Eva Campo
    Laboratory for Flavor Analysis and Enology, Department of Analytical Chemistry, Faculty of Sciences, University of Zaragoza, Zaragoza, Spain
    J Agric Food Chem 56:2477-84. 2008
    Wines from Pedro Ximénez (PX), Fino, botrytized Sauternes, and Cava were screened by gas chromatography-olfactometry (GC-O), and the most relevant aroma compounds were further quantified in six different wines of each group...
  29. ncbi Comprehensive two-dimensional gas chromatography of complex samples by using a 'reversed-type' column combination: application to food analysis
    Mohamed Adahchour
    Department of Analytical Chemistry and Applied Spectroscopy, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
    J Chromatogr A 1054:47-55. 2004
    The practicability and potential of a non-orthogonal approach in comprehensive two-dimensional gas chromatography (GC x GC) were studied and compared to those of the orthogonal approach for two different complex matrices, and using ..
  30. ncbi Extending the molecular application range of gas chromatography
    Erwin Kaal
    Polymer Analysis Group, van t Hoff Institute for Molecular Sciences, University of Amsterdam, Amsterdam, The Netherlands
    J Chromatogr A 1184:43-60. 2008
    b>Gas chromatography is an important analytical technique for qualitative and quantitative analysis in a wide range of application areas...
  31. ncbi Evaluation of exudates by solid phase microextraction-gas chromatography
    Jaroslav Julák
    Department of Immunology and Microbiology, 1st Medical Faculty, Charles University, Katerinska 32, 121 08 2 Prague, Czech Republic
    J Microbiol Methods 52:115-22. 2003
    Head-space solid phase microextraction combined with gas chromatography (SPME-GC) was used for the determination of bacterial volatile fatty acid (VFA) patterns. The method was validated with cultures of reference bacterial strains...
  32. ncbi Odour fingerprint acquisition by means of comprehensive two-dimensional gas chromatography-olfactometry and comprehensive two-dimensional gas chromatography/mass spectrometry
    Alessandro Casilli
    Dipartimento Farmaco Chimico, Facolta di Farmacia, Universita di Messina, Viale Annunziata, 98168 Messina, Italy
    J Chromatogr A 1141:279-86. 2007
    The analysis of complex matrices, such as perfumes, by means of gas chromatography-olfactometry (GC-O) can be rather imprecise due to the co-elutions, leading to a possible masking of odour-active trace-level compounds by major ..
  33. ncbi Gas chromatography-olfactometry and chemical quantitative study of the aroma of six premium quality spanish aged red wines
    Laura Culleré
    Department of Analytical Chemistry, Faculty of Sciences, University of Zaragoza, 50009 Zaragoza, Spain
    J Agric Food Chem 52:1653-60. 2004
    The aroma of six premium quality Spanish red wines has been studied by quantitative gas chromatography-olfactometry (GC-O) and techniques of quantitative chemical analysis...
  34. ncbi A double plasma gas chromatography injector and detector
    Omar P Naji
    Imperial College London, Department of Chemistry, London, UK
    Lab Chip 4:431-7. 2004
    A direct-current, chip-based plasma has been used for gas sample injection in gas chromatography. A second identical plasma chip has been used as the excitation source for an optical emission detector...
  35. ncbi Comprehensive two-dimensional gas chromatography: metrics, potentials, limits
    L M Blumberg
    Fast GC Consulting, P O Box 585, Hockessin, DE 19707, USA
    J Chromatogr A 985:29-38. 2003
    Metrics for evaluation of separation performance of comprehensive two-dimensional gas chromatography (GCxGC) and for quantitative comparison of that performance with similar performance of its 1D (one-dimensional) counterparts are ..
  36. ncbi Gas chromatography-olfactometry in food flavour analysis
    Barbara d'Acampora Zellner
    Dipartimento Farmaco Chimico, Facolta di Farmacia, Universita di Messina, Viale Annunziata, 98168 Messina, Italy
    J Chromatogr A 1186:123-43. 2008
    The application of gas chromatography-olfactometry (GC-O) in food flavour analysis represents to be a valuable technique to characterise odour-active, as well as character impact compounds, responsible for the characterizing odour of a ..
  37. ncbi Multiresidue analysis of pesticides in soil by supercritical fluid extraction/gas chromatography with electron-capture detection and confirmation by gas chromatography-mass spectrometry
    Sandra R Rissato
    Departments of Chemistry and Biology, Paulista State University UNESP, P O Box 473, 17033 360 Bauru SP, Brazil
    J Agric Food Chem 53:62-9. 2005
    ..For the SFE method, C-18 cartridges were used for the cleanup. The analytical screening was performed by gas chromatography equipped with electron-capture detection (ECD)...
  38. ncbi Low-temperature clean-up method for the determination of pyrethroids in milk using gas chromatography with electron capture detection
    Simone Machado Goulart
    Departamento de Quimica, Universidade Federal de Vicosa, Av P H Rolfs, S N, 36570 000 Viçosa MG, Brazil
    Talanta 75:1320-3. 2008
    ..Some samples presented contamination with deltamethrin at levels below the maximum contamination limits established by the FAO...
  39. ncbi Multidimensional gas chromatography using a double cool-strand interface
    Frederic Begnaud
    Firmenich SA, Corporate R and D Division, P O Box 239, CH 1211 Geneva 8, Switzerland
    J Chromatogr A 1071:13-20. 2005
    Commercial interfaces for multidimensional gas chromatography (MDGC) are based either on a valve or a pneumatic switching between columns. Both exhibit significant drawbacks and only few suppliers exist...
  40. pmc Determination of campesterol, stigmasterol, and beta-sitosterol in saw palmetto raw materials and dietary supplements by gas chromatography: collaborative study
    Wendy R Sorenson
    Covance Laboratories, 3301 Kinsman Blvd, Madison, WI 53704, USA
    J AOAC Int 90:670-8. 2007
    ..Phytosterols were derivatized to trimethylsilyl ethers and then quantified by gas chromatography with hydrogen flame ionization detection...
  41. ncbi Fasting whole blood as a biomarker of essential fatty acid intake in epidemiologic studies: comparison with adipose tissue and plasma
    Ana Baylin
    Department of Nutrition, Harvard School of Public Health, Boston, MA 02115, USA
    Am J Epidemiol 162:373-81. 2005
    ..Fatty acids were identified by using capillary gas chromatography. Correlation coefficients adjusted for age, sex, and body mass index were calculated...
  42. ncbi A new approach to examine the relationships between sensory and gas chromatography-olfactometry data using Generalized Procrustes analysis applied to six French Chardonnay wines
    Y Le Fur
    Unité Mixte de Recherches sur les Arômes ENESAD INRA, Etablissement National d Enseignement Supérieur Agronomique de Dijon, 26 Boulevard Docteur Petitjean, B P 87999, F 21079 Dijon cedex, France
    J Agric Food Chem 51:443-52. 2003
    Six French Chardonnay wines were submitted to both sensory and combined headspace/gas chromatography-olfactometry analyses...
  43. ncbi Development of a matrix solid-phase dispersion method for the screening of polybrominated diphenyl ethers and polychlorinated biphenyls in biota samples using gas chromatography with electron-capture detection
    A Martinez
    Departamento de Quimica Analitica, Nutricion y Bromatologia, Facultad de Quimica, Instituto de Investigacion y Analisis Alimentario, Universidad de Santiago de Compostela, Santiago de Compostela 15782, Spain
    J Chromatogr A 1072:83-91. 2005
    ..Globally, recoveries higher than 75% and quantification limits around 0.4 ng/g have been achieved using gas chromatography with electron-capture detection (GC-ECD).
  44. ncbi Trace analysis of residual methyl methanesulfonate, ethyl methanesulfonate and isopropyl methanesulfonate in pharmaceuticals by capillary gas chromatography with flame ionization detection
    Weiyong Li
    Global Analytical Development, Johnson and Johnson Pharmaceutical Research and Development, LLC, Raritan, NJ 08869, USA
    J Chromatogr A 1046:297-301. 2004
    ..A limit of detection of about 1 microg/g (1 ppm) and limit of quantitation of 5 microg/g (5 ppm) were achieved for the mesylate esters in drug substance samples. The method optimization and validation are also discussed in this paper...
  45. ncbi Retention models for programmed gas chromatography
    G Castello
    University of Genova, Dipartimento di Chimica e Chimica Industriale, Via Dodecaneso 31, Genova I 16146, Italy
    J Chromatogr A 1216:1607-23. 2009
    ..temperatures, peak widths, retention indices and separation numbers in programmed temperature and pressure gas chromatography by starting from preliminary measurements of the retention in isothermal and isobaric conditions are ..
  46. ncbi Characterizing human adipose tissue lipids by long echo time 1H-MRS in vivo at 1.5 Tesla: validation by gas chromatography
    Jesper Lundbom
    Department of Medicine, Division of Cardiology, University of Helsinki, Helsinki, Finland
    NMR Biomed 23:466-72. 2010
    ..SAT) triglyceride composition and to validate the findings with fatty acid (FA) analysis of SAT biopsies by gas chromatography (GC). (1)H-MRS spectra were acquired with a 1...
  47. ncbi Simultaneous determination of organophosphorus pesticides in Chinese herbal medicines by microwave-assisted extraction coupled with dispersive-solid phase extraction and gas chromatography
    Yi Qun Wan
    Nanchang University, China
    Biomed Chromatogr 24:961-8. 2010
    ..The determination of pesticides in the final extracts was carried out by gas chromatography-flame photometric detection...
  48. ncbi Comparison of aroma volatiles in commercial Merlot and Cabernet Sauvignon wines using gas chromatography-olfactometry and gas chromatography-mass spectrometry
    Ozan Gurbuz
    Citrus Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida, 700 Experiment Station Road, Lake Alfred, Florida 33850, USA
    J Agric Food Chem 54:3990-6. 2006
    ..Volatiles were sampled using solid phase microextraction and analyzed using time-intensity gas chromatography-olfactometry and gas chromatography-mass spectrometry (GC-MS)...
  49. pmc Alignment of retention time obtained from multicapillary column gas chromatography used for VOC analysis with ion mobility spectrometry
    Thorsten Perl
    Department of Anaesthesiology, Emergency and Intensive Care Medicine, University of Gottingen, 37073 Gottingen, Germany
    Anal Bioanal Chem 397:2385-94. 2010
    ....
  50. ncbi Facile hyphenation of gas chromatography and a microcantilever array sensor for enhanced selectivity
    Peter J Chapman
    Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996 1600, USA
    Anal Chem 79:364-70. 2007
    ....
  51. ncbi Determination of retention indices in constant inlet pressure mode and conversion among different column temperature conditions in comprehensive two-dimensional gas chromatography
    Shukui Zhu
    National Chromatographic R and A Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
    J Chromatogr A 1150:28-36. 2007
    ..and retention indices in constant inlet pressure mode was developed in comprehensive two-dimensional gas chromatography. At the same time, the conversion of GC x GC retention indices among different column temperature conditions ..
  52. ncbi The combination of gas chromatography-olfactometry and multidimensional gas chromatography for the characterisation of essential oils
    Graham Eyres
    Department of Food Science, University of Otago, P O Box 56, Dunedin 9054, New Zealand
    J Chromatogr A 1150:70-7. 2007
    ..is presented for the identification of character-impact odorants in essential oil samples using (a) gas chromatography-olfactometry (GC-O); (b) comprehensive two-dimensional gas chromatography (GC x GC) combined to time-of-..
  53. ncbi Detector technologies for comprehensive two-dimensional gas chromatography
    Carin Von Mühlen
    Universidade Federal do Rio Grande do Sul, Instituto de Quimica, Porto Alegre, RS, Brasil
    J Sep Sci 29:1909-21. 2006
    ..These factors are discussed here as a means to appreciate the technical demands of detection in GC x GC. The MS detector will not be included in this review...
  54. ncbi Characterization of five typical agave plants used to produce mezcal through their simple lipid composition analysis by gas chromatography
    Juan Fco Martínez-Aguilar
    Laboratorio 101, Departamento de Quimica Analitica, Facultad de Quimica, Universidad Nacional Autonoma de Mexico, D F, Mexico
    J Agric Food Chem 57:1933-9. 2009
    ..profiles of the mature heads of each plant were determined by means of a modified Bligh-Dyer extraction and gas chromatography. Sixteen fatty acids were identified, from capric to lignoceric, ranging from 0.40 to 459 microg/g of agave...
  55. ncbi Development of a novel odor measurement system using gas chromatography with surface acoustic wave sensor
    Edward J Staples
    Q and A Solutions, Westlake Village, CA, USA
    J Air Waste Manag Assoc 58:1522-8. 2008
    ..system for creating arrays of virtual chemical sensors with nonoverlapping responses using ultrahigh-speed gas chromatography with a surface acoustic wave sensor (GC/SAW)...
  56. ncbi Sensitive determination of 2,4,6-trichloroanisole in water samples by ultrasound assisted emulsification microextraction prior to gas chromatography-tandem mass spectrometry analysis
    Ariel R Fontana
    Grupo de Investigacion y Desarrollo en Quimica Analitica QUIANID LISAMEN, CCT CONICET Mendoza, Av Ruiz Leal s n, Parque General San Martín, Mendoza, Argentina
    Talanta 81:1536-41. 2010
    ..and preconcentration of 2,4,6-trichloroanisole (2,4,6-TCA) from water samples prior to its determination by gas chromatography-tandem mass spectrometry (GC-MS/MS)...
  57. ncbi Prediction of sensory properties of Brazilian Arabica roasted coffees by headspace solid phase microextraction-gas chromatography and partial least squares
    J S Ribeiro
    Theoretical and Applied Chemometrics Laboratory, Chemistry Institute, University of Campinas, P O Box 6154, 13083 970 Campinas, SP, Brazil
    Anal Chim Acta 634:172-9. 2009
    ....
  58. pmc Determination of campesterol, stigmasterol, and beta-sitosterol in saw palmetto raw materials and dietary supplements by gas chromatography: single-laboratory validation
    Wendy R Sorenson
    Covance Laboratories, 3301 Kinsman Blvd, Madison, WI 53704, USA
    J AOAC Int 89:22-34. 2006
    ..Phytosterols were derivatized to trimethylsilyl ethers and then quantified by gas chromatography with a hydrogen flame ionization detector...
  59. ncbi Effects of the sniffing port air makeup in gas chromatography-olfactometry
    K Hanaoka
    Ecole Nationale Supérieure des Industries Agricoles et Alimentaires, Département Science de l Aliment, Massy, France
    J Agric Food Chem 48:2368-71. 2000
    A time-intensity gas chromatography-olfactometry (GCO) apparatus was developed to study some aerodynamic parameters that may influence odor detection and intensity measurements by the subjects...
  60. ncbi Simultaneous quantification of glyphosate, glufosinate, and their major metabolites in rice and soybean sprouts by gas chromatography with pulsed flame photometric detector
    Su Hsiang Tseng
    Department of Health, Executive Yuan, Taipei 115 51, Taiwan, Republic of China
    J Agric Food Chem 52:4057-63. 2004
    ..acid (AMPA) and 3-(methylphosphinico)propionic acid (3-MPPA), in rice and soybean sprouts by gas chromatography (GC) equipped with a pulsed flame photometric detector (PFPD)...
  61. ncbi Interlaboratory comparison for the determination of five residual organochlorine pesticides in ginseng root samples by gas chromatography
    Mei Fung Kong
    Analytical and Advisory Services Division, Government Laboratory of the Hong Kong Special Administrative Region HKSAR, Homantin Government Offices, Hong Kong
    J AOAC Int 90:1133-41. 2007
    ..It was recommended that laboratories review and rectify the situation promptly so that they would have a better understanding of measurement uncertainty or the test service provided...
  62. ncbi Gas chromatography-olfactometry
    Conor M Delahunty
    Department of Food Science, University of Otago, Dunedin, New Zealand
    J Sep Sci 29:2107-25. 2006
    ..Considerable emphasis is placed on the requirement for multidimensional GC analysis, and on best practice when using human assessors...
  63. ncbi Applicability of solid-phase microextraction combined with gas chromatography atomic emission detection (GC-MIP AED) for the determination of butyltin compounds in sediment samples
    J Carpinteiro
    Departamento de Quimica Analitica, Nutricion y Bromatologia, Instituto de Investigacion y Analisis Alimentario, Universidad de Santiago de Compostela, Santiago de Compostela 15782, Spain
    Anal Bioanal Chem 380:853-7. 2004
    ..An aliquot of the centrifuged extract was placed on a vial where compounds were ethylated and concentrated on a PDMS fiber using the headspace mode. Determinations were carried out using GC-MIP AED...
  64. ncbi Sequential ethoxycarbonylation, methoximation and tert-butyldimethylsilylation for simultaneous determination of amino acids and carboxylic acids by dual-column gas chromatography
    Man Jeong Paik
    College of Pharmacy, Sungkyunkwan University, Suwon, Kyunggi Do 440 746, South Korea
    J Chromatogr A 1034:13-23. 2004
    ..acidification and solid-phase extraction, tert-butyldimethylsilylation was performed for direct analysis by gas chromatography (GC) on dual-columns with different polarities, which provided simultaneous separation of multiple amino ..
  65. ncbi Retention indexes for temperature-programmed gas chromatography of polychlorinated biphenyls
    Shaogang Chu
    Department of Environmental Health and Toxicology, School of Public Health, State University of New York at Albany, Albany, New York 12201 0509, USA
    Anal Chem 76:5486-97. 2004
    ..on two commonly used columns (DB-XLB and DB-5), as well as on a supplementary column of DB-17 in capillary gas chromatography, were determined using this system...
  66. ncbi Validation of a quantitative assay of arbutin using gas chromatography in Origanum majorana and Arctostaphylos uva-ursi extracts
    Aline Lamien-Meda
    Institute for Applied Botany and Pharmacognosy, Department of Farm Animal and Public Health in Veterinary Medicine, University of Veterinary Medicine, Vienna, Austria
    Phytochem Anal 20:416-20. 2009
    ..Arbutin is a skin-whitening agent that occurs naturally in the bark and leaves of various plants. It is commonly quantified in plant extracts and skin-whitening products by HPLC...
  67. ncbi Analysis of hydroxylated polycyclic aromatic hydrocarbons in urine using comprehensive two-dimensional gas chromatography with a flame ionization detector
    Leiliane Coelho André Amorim
    Chemistry Department, ICEx, Federal University of Minas Gerais, Av Antonio Carlos 6627, Belo Horizonte 31270 901, MG, Brazil
    J Chromatogr A 1216:2900-4. 2009
    ..The objective of this study was the development of a comprehensive two-dimensional gas chromatography (GCxGC) method using a flame ionisation detector (FID) to simultaneously determine 10 hydroxylated PAH...
  68. ncbi Determination of acrylamide in Chinese traditional carbohydrate-rich foods using gas chromatography with micro-electron capture detector and isotope dilution liquid chromatography combined with electrospray ionization tandem mass spectrometry
    Yu Zhang
    Department of Food Science and Nutrition, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, Zhejiang Province, PR China
    Anal Chim Acta 584:322-32. 2007
    ..One is based on derivatization with potassium bromate and potassium bromide without clean-up prior to gas chromatography with micro-electron capture detector (GC-MECD)...
  69. ncbi Novel method for identification and quantification of methanol and ethanol in alcoholic beverages by gas chromatography-Fourier transform infrared spectroscopy and horizontal attenuated total reflectance-Fourier transform infrared spectroscopy
    Kakali Sharma
    Vivekananda Mahavidyalaya, Haripal, Hooghly, Department of Chemistry, West Bengal, India
    J AOAC Int 92:518-26. 2009
    ..Other advanced techniques involve head space gas chromatography (GC), GC-flame ionization detection, high-performance liquid chromatography, enzymatic reactions, and ..
  70. ncbi Gas chromatography/tandem mass spectrometry analysis of alkylresorcinols in red blood cells
    Kornél Nagy
    BioAnalytical Science Department, Nestle Research Centre, Nestec Ltd, Lausanne, Switzerland
    Rapid Commun Mass Spectrom 22:4098-104. 2008
    ..However, their high-throughput quantitative analysis by gas chromatography/mass spectrometry (GC/MS) is hindered by the time-consuming sample preparation and, more importantly, by ..
  71. ncbi Predicting the aerosol performance of dry powder inhalation formulations by interparticulate interaction analysis using inverse gas chromatography
    Henry H Y Tong
    School of Health Sciences, Macao Polytechnic Institute, Macao, China
    J Pharm Sci 95:228-33. 2006
    Previous studies have demonstrated the utility of inverse gas chromatography (IGC) in discriminating the differences in surface energy between salmeterol xinafoate (SX) powders prepared by conventional sequential batch crystallization and ..
  72. ncbi Determination of widely used non-steroidal anti-inflammatory drugs in water samples by in situ derivatization, continuous hollow fiber liquid-phase microextraction and gas chromatography-flame ionization detector
    Z Es'haghi
    Department of Chemistry, Faculty of Sciences, Payame Noor University, Iran zarrin
    Anal Chim Acta 641:83-8. 2009
    ..The limits of detection were 1-2 ng L(-1). Repeatability of this method on an intra-day scale was 3.4-10.2% (RSD%). NSAIDs have been detected in several municipal wastewater samples, and the concentration range was 9.0-19.0 ng L(-1)...
  73. ncbi Organohalogen and organophosphorous pesticide method for ginseng root--a comparison of gas chromatography-single quadrupole mass spectrometry with high resolution time-of-flight mass spectrometry
    Douglas G Hayward
    U S Food and Drug Administration, Center for Food Safety and Applied Nutrition, Office of Regulatory Science, 5100 Paint Branch Parkway, HFS 706, College Park, Maryland 20740 5350, USA
    Anal Chem 81:5716-23. 2009
    ..Each purified pesticide extract was determined by both gas chromatography single quadrupole mass spectrometry using selected ion monitoring (GC-qMS-SIM) and by gas chromatography ..
  74. ncbi Miniaturized membrane-assisted solvent extraction combined with gas chromatography/electron-capture detection applied to the analysis of volatile organic compounds
    Manuela Schellin
    Department of Analytical Chemistry, UFZ Centre for Environmental Research, Permoserstrasse 15, 04318 Leipzig, Germany
    J Chromatogr A 1103:211-8. 2006
    ..The method can be fully automated and moreover, it allows the simultaneous determination of volatile and semi volatile compounds...
  75. ncbi Identification of biologically active triterpenes and sterols present in hexane extracts from Miconia species using high-resolution gas chromatography
    Eduardo J Crevelin
    Universidade de Franca, Av Dr Armando Salles de Oliveira, 201 Parque Universitário, CEP 14404 600, Franca, SP, Brazil
    Biomed Chromatogr 20:827-30. 2006
    ..biologically active triterpenes and sterols present in the hexane extracts of six species of Miconia using gas chromatography. The main compounds present in these extracts are beta-amyrin, alpha-amyrin, and beta-sitosterol...
  76. pmc Comparative visualization for comprehensive two-dimensional gas chromatography
    Benjamin V Hollingsworth
    GC Image LLC, P O Box 57403, Lincoln NE 68505 7403, USA
    J Chromatogr A 1105:51-8. 2006
    This paper investigates methods for comparing datasets produced by comprehensive two-dimensional gas chromatography (GC x GC)...
  77. ncbi Determination of carbamate, phenylurea and phenoxy acid herbicide residues by gas chromatography after potassium tert-butoxide/dimethyl sulphoxide/ethyl iodide derivatization reaction
    E Crespo-Corral
    Department of Analytical Chemistry, Faculty of Chemistry, Complutense University of Madrid, 28040 Madrid, Spain
    J Chromatogr A 1209:22-8. 2008
    ..as eluent on-line with this reaction was developed to determine these herbicides in water samples by gas chromatography-mass spectrometry...
  78. ncbi Simultaneous liquid-liquid microextraction/methylation for the determination of haloacetic acids in drinking waters by headspace gas chromatography
    M J Cardador
    Department of Analytical Chemistry, Campus of Rabanales, University of Cordoba, E 14071 Cordoba, Spain
    J Chromatogr A 1209:61-9. 2008
    A novel analytical method that combines simultaneous liquid-liquid microextraction/methylation and headspace gas chromatography-mass spectrometry for the determination of nine haloacetic acids (HAAs) in water was reported...
  79. ncbi Determination of monomethylmercury in low- and high-polluted sediments by microwave extraction and gas chromatography with atomic fluorescence detection
    J J Berzas Nevado
    Regional Institute for Applied Scientific Research, University of Castilla La Mancha, E 13071 Ciudad Real, Spain
    Anal Chim Acta 608:30-7. 2008
    ..Both steps can be combined if necessary. MMHg content has been found in good agreement with the certified value for the reference materials (IAEA-405 and ERM-CC580)...
  80. ncbi Reliable enzyme immunoassay detection for chlorothalonil: fundamental evaluation for residue analysis and validation with gas chromatography
    Eiki Watanabe
    National Institute for Agro Environmental Sciences, 3 1 3 Kannondai, Tsukuba City, Ibaraki, Japan
    J Chromatogr A 1129:273-82. 2006
    ..Nevertheless, the results demonstrated that the proposed ELISA is a reliable, cost-effective, and rapid quantitative method for chlorothalonil residue...
  81. ncbi Determination of D- and L-amino acids produced by cyanobacteria using gas chromatography on Chirasil-Val after derivatization with pentafluoropropyl chloroformate
    Helena Zahradnícková
    Biology Centre, Academy of Sciences of the Czech Republic, Branisovska 31, 370 05, Ceske Budejovice, Czech Republic
    Anal Bioanal Chem 388:1815-22. 2007
    ..Based on the obtained results it can be assumed that young populations excrete AAs in higher concentrations and a different composition compared to actively growing populations...
  82. ncbi Determination of enantiomers of synthetic pyrethroids in water by solid phase microextraction - enantioselective gas chromatography
    Weiping Liu
    Department of Environmental Sciences, University of California, Riverside, California 92521, USA
    J Agric Food Chem 52:736-41. 2004
    ..enantiomers of (Z)-cis-bifenthrin and cis-permethrin in water using coupled SPME and enantioselective gas chromatography (GC)...
  83. ncbi Assay validation for three antidepressants in pharmaceutical formulations: practical approach using capillary gas chromatography
    J J Berzas Nevado
    Department of Analytical Chemistry and Food Technology, University of Castilla La Mancha, 13071 Ciudad Real, Spain
    J Pharm Biomed Anal 38:52-9. 2005
    ..The results presented in this report show the applied gas chromatographic method is acceptable for the determination of the three antidepressants in the pharmaceutical formulations above mentioned...
  84. ncbi Pesticide multiresidue analysis in Panax ginseng (C. A. Meyer) by solid-phase extraction and gas chromatography with electron capture and nitrogen-phosphorus detection
    Young Seok Park
    Natural Products Chemistry Laboratory, Institute of Agricultural Science and Technology, Chonnam National University, 300 Yong Bong Dong, Buk Ku, Gwangju 500 757, Republic of Korea
    Biomed Chromatogr 21:29-39. 2007
    An analytical multi-residue method using gas chromatography coupled with electron capture and a nitrogen-phosphorus detector was investigated for the simultaneous determination of 18 commonly used insecticides and fungicides in Korean ..
  85. ncbi Determination of volatile organic compounds in biological samples using headspace solid-phase microextraction and gas chromatography: toluene and styrene
    Radhika Barua
    Department of Clinical and Laboratory Sciences, SUNY at Buffalo, Buffalo, New York, USA
    J Anal Toxicol 32:379-86. 2008
    ..of low concentrations of styrene and toluene in very small volumes of biological samples using HS-SPME and gas chromatography (GC) equipped with a flame-ionization detector...
  86. ncbi Comprehensive investigation and optimisation of the main experimental variables in stir-bar sorptive extraction (SBSE)-thermal desorption-capillary gas chromatography (TD-CGC)
    Kevin MacNamara
    Central Laboratory, Irish Distillers Pernod Ricard, Midleton Distillery, Midleton, Co Cork, Ireland
    Anal Chim Acta 636:190-7. 2009
    ..The relative importance of contributing variables was clearly established and an optimum set of conditions was established for more uniform enrichment in a single analysis for a test mix of compounds with wide ranging polarities...
  87. pmc Simultaneous quantification of Delta9-tetrahydrocannabinol, 11-hydroxy-Delta9-tetrahydrocannabinol, and 11-nor-Delta9-tetrahydrocannabinol-9-carboxylic acid in human plasma using two-dimensional gas chromatography, cryofocusing, and electron impact-mass s
    Ross H Lowe
    Chemistry and Drug Metabolism Section, Intramural Research Program, National Institute on Drug Abuse, 5500 Nathan Shock Drive, Baltimore, MD 21224, USA
    J Chromatogr A 1163:318-27. 2007
    A two-dimensional (2D) gas chromatography/electron impact-mass spectrometry (GC/EI-MS) method for simultaneous quantification of Delta(9)-tetrahydrocannabinol (THC), 11-hydroxy-Delta(9)-tetrahydrocannabinol (11-OH-THC), and 11-nor-Delta(9)..
  88. ncbi An improved method for determining medium- and long-chain FAMEs using gas chromatography
    Zhidong Xu
    Methodist Research Institute, Clarian Health, Indiana University School of Medicine, Indianapolis, IN 46202, USA
    Lipids 45:199-208. 2010
    ..we determined the fatty acid composition of lipid emulsions (Omegaven and Lipidem) on a Shimadzu GC2010 gas chromatography (GC) system using a capillary GC column (Zebron ZB-WAX plus, 30 m, 0.25 mm ID, 0.25 microm)...
  89. ncbi Analysis of aqueous pyrethroid residuals by one-step microwave-assisted headspace solid-phase microextraction and gas chromatography with electron capture detection
    Hong Ping Li
    Residue Control Division, Taiwan Agricultural Chemicals and Toxic Substances Research Institute, Council of Agriculture, Wu Fong, Taichung County 413, Taiwan
    Talanta 79:466-71. 2009
    ..MA-HS-SPME) has been applied to be a pretreatment step in the analysis of aqueous pyrethroid residuals by gas chromatography (GC) with electron capture detection (ECD)...
  90. ncbi Aroma compound analysis of Piper nigrum and Piper guineense essential oils from Cameroon using solid-phase microextraction-gas chromatography, solid-phase microextraction-gas chromatography-mass spectrometry and olfactometry
    Leopold Jirovetz
    Institute of Pharmaceutical Chemistry, University of Vienna, Althanstrasse 14, A 1090 Vienna, Austria
    J Chromatogr A 976:265-75. 2002
    ..Further aroma impressions can be attributed to mono- and sesquiterpenes, hexane, octane and nonane derivatives...
  91. ncbi Methods for selective determination of persistent organochlorine pesticide residues in water and sediments by capillary gas chromatography and electron-capture detection
    O S Fatoki
    Department of Chemistry, University of Fort Hare, Alice 5700, South Africa
    J Chromatogr A 983:225-36. 2003
    ..6 (aldrin and 2,4-DDD) to 184 +/- 0.12 ng/g (beta-BHC) in sediments for triplicate analyses. Some endocrine disrupting OCPs such as DDT, DDE, heptachlor, endosulphan and the chlordanes were detected...
  92. ncbi Improved gas chromatography methods for micro-volume analysis of haloacetic acids in water and biological matrices
    Fengwu Wu
    Department of Public Health Sciences, University of Alberta, Edmonton, Canada
    Analyst 127:1318-23. 2002
    A fast headspace solid-phase microextraction gas chromatography method for micro-volume (0.1 mL) samples was optimized for the analysis of haloacetic acids (HAAs) in aqueous and biological samples...
  93. pmc Comparison of chemical-activated luciferase gene expression bioassay and gas chromatography for PCB determination in human serum and follicular fluid
    A Pauwels
    Toxicological Center Pharmaceutical Sciences, Antwerp University, Wilrijk, Belgium
    Environ Health Perspect 108:553-7. 2000
    ..Major polychlorinated biphenyl (PCB) congeners were quantified by chemical analysis using gas chromatography with electron-capture detection, and the chemical-activated luciferase gene expression (CALUX) bioassay was ..
  94. ncbi Determination of compound-specific Hg isotope ratios from transient signals using gas chromatography coupled to multicollector inductively coupled plasma mass spectrometry (MC-ICP/MS)
    Mark Dzurko
    Trent University, 1600 West Bank Drive, Peterborough, ON, K9J 7B8, Canada
    Anal Bioanal Chem 393:345-55. 2009
    ..Compound-specific isotope ratio measurements were performed by gas chromatography interfaced to MC-ICP/MS...
  95. ncbi High-speed gas chromatography in doping control: fast-GC and fast-GC/MS determination of beta-adrenoceptor ligands and diuretics
    Claudio Brunelli
    Dipartimento di Scienza e Tecnologia del Farmaco, Universita di Torino, Italy
    J Sep Sci 29:2765-71. 2006
    ..For this work a quadrupole MS with inert ion source has been used, demonstrating that the quadrupole technology is perfectly adequate to provide precise integration of 400 ms-wide GC peaks...
  96. ncbi Analysis of free and conjugated phytosterols in tobacco by an improved method using gas chromatography-flame ionization detection
    Wen Hui Liu
    Research Center of Tobacco and Health, University of Science and Technology of China, Hefei 230052, China
    J Chromatogr A 1163:304-11. 2007
    An improved and simple method using capillary gas chromatography coupled with a flame ionization detection system (GC-FID) has been developed for quantitative analysis of free and conjugated phytosterols in tobacco...
  97. ncbi Comparison of signal-to-noise, blank determination, and linear regression methods for the estimation of detection and quantification limits for volatile organic compounds by gas chromatography
    M Marsin Sanagi
    Universiti Teknologi Malaysia, Department of Chemistry, Faculty of Science, 81310 UTM Skudai, Johor, Malaysia
    J AOAC Int 92:1833-8. 2009
    ..It is, therefore, essential to have a clearly described procedure for estimating the LOD and LOQ during method validation to allow interlaboratory comparisons...
  98. ncbi A simple automated system for measuring soil respiration by gas chromatography
    Claudio Mondini
    CRA RPS Centro di Ricerca per lo Studio delle Relazioni tra Pianta e Suolo, Gruppo di Ricerca di Gorizia, Via Trieste 23, Gorizia, Italy
    Talanta 81:849-55. 2010
    ..The automatic and frequent measurements provided by the system make possible an accurate description of the dynamics of gas evolution from soil samples under laboratory conditions...
  99. ncbi ["Ghost peak" in gas chromatography in a delirious woman with severe metabolic acidosis. Intoxication with an unknown substance?]
    D Franzen
    Medizinische Klinik, Spital Zollikerberg, Zollikerberg, Zurich, Schweiz
    Dtsch Med Wochenschr 131:2770-3. 2006
    ..A 31-year-old female with known type 1 diabetes mellitus was referred because of symptomatic hyperglycemia. On admission she was delirious and impressed with marked Kussmaul breathing. All other vital signs were normal...
  100. ncbi Rapid analysis of food products by means of high speed gas chromatography
    Paola Donato
    Dipartimento Farmaco Chimico, Facolta di Farmacia, Universita di Messina, Viale Annunziata, Messina, Italy
    J Sep Sci 30:508-26. 2007
    ..The present review provides an overview of the employment of fast GC techniques for the analysis of food constituents and contaminants. A brief historical and theoretical background is also provided for the approaches described...
  101. ncbi Comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry combined with solid phase microextraction as a powerful tool for quantification of ethyl carbamate in fortified wines. The case study of Madeira wine
    Rosa Perestrelo
    Departamento de Quimica, Universidade de Aveiro, 3810 193 Aveiro, Portugal
    J Chromatogr A 1217:3441-5. 2010
    ..based on headspace solid phase microextraction (HS-SPME) combined with comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry (GC x GC-ToFMS) was developed for the identification and quantification of ..

Research Grants66

  1. Phthalate Exposure and Pregnancy Outcome
    T Peter Stein; Fiscal Year: 2010
    ..of phthalate metabolites in urine and plasma early and late in pregnancy will be measured by isotope ratio gas chromatography mass spectrometry with selective ion monitoring...
  2. Pain and Hypoxia in Premature Neonates
    DANILYN MAG AKAT ANGELES; Fiscal Year: 2012
    ..by measuring plasma levels of xanthine oxidase (XO), xanthine dehydrogenase (XDH), and allantoin using gas chromatography and mass spectroscopy...
  3. Maternal Obesity and Gestational Diabetes: Impact on Metabolome
    William L Lowe; Fiscal Year: 2013
    ..mass spectrometry- based platform to measure amino acids, acylcarnitines, and conventional metabolites and a gas chromatography:mass spectrometry-based non-targeted platform to analyze a wide variety of metabolites to define the ..
  4. Tea Polyphenols in Chemoprevention of Prostate Cancer
    SUSANNE MARGARETE HENNING; Fiscal Year: 2011
    ..liquid chromatography with coularray electrochemical detection as well as mass spectrorrietry (MS) and gas chromatography/ MS to determine the concentrations of polyphenols, theaflavins and six different endogenous and colonic ..
  5. Roles of pulmonary and hepatic P4501A enzymes in hyperoxic lung injury in mice
    Bhagavatula Moorthy; Fiscal Year: 2010
    ..Levels of F2 isoprostanes and isofurans will be measured in lung and liver by gas chromatography/ mass spectrometry (GC-MS). (4)...
  6. Continuation of FERN Activities at the Connecticut Agricultural Experiment Statio
    LAURIE J PETERSON-WRIGHT; Fiscal Year: 2013
    ..depending on Forensic Chemistry Center (FCC) and FERN National Program Office (NPO) input: (1) The use of Gas Chromatography- Mass Spectrometry (GC-MS) for the analysis of unknown compounds in foods...
  7. REGULATION OF 15N UREA ISOTOPOMERS PRODUCTION
    Itzhak Nissim; Fiscal Year: 2013
    ..We will use 15N and/or 13C labeled precursors and gas chromatography-mass spectrometry (GC-MS), MALDI-TOF-mass spectrometry, nuclear magnetic resonance (NMR) and molecular ..
  8. Epidemiological Research on Autism in Jamaica - Phase II
    Mohammad H Rahbar; Fiscal Year: 2013
    ..Serum samples will be analyzed for 92 of the 209 PCBs congeners and 18 OC pesticides using capillary column gas chromatography by a CDC-certified lab at the Division of Chemistry and Toxicology at Michigan Department of Community ..
  9. Cardiac Autonomic Neuropathy and Myocardial Dysfunction in Type 1 Diabetes
    RODICA BUSUI POP-BUSUI; Fiscal Year: 2013
    ..These studies will help elucidate mechanisms of myocardial dysfunction in T1DM with ultimate goal of designing future studies implementing therapeutic strategies aimed at preventing increased cardiovascular risk in patients with T1DM. ..
  10. REGULATION OF 15N UREA ISOTOPOMERS PRODUCTION
    Itzhak Nissim; Fiscal Year: 2009
    ..We will use 15N and/or 13C labeled precursors and state-of-the-art methodologies, including gas chromatography-mass spectrometry (GC-MS), MALDI-TOF-mass spectrometry, nuclear magnetic resonance (NMR) and techniques of ..
  11. Impact of Estrogens and Menopause on Interacting Monoamine Neurotransmitters in t
    Jeffrey K Yao; Fiscal Year: 2013
    ..chromatography coupled with a 16-channel Coulometric Multi-Electrode Array System (HPLC-CMEAS) and capillary gas chromatography with a flame-ionization detector (GC-FID)...
  12. GLUCOSE/SECRETAGOGUE METABOLISM IN PANCREATIC ISLETS
    MICHAEL JOHN MACDONALD; Fiscal Year: 2013
    ..Lipids in cells and subcellular fractions are measured with gas chromatography. Mass spectrometry is used to measure short chain acyl-CoAs and to identify small molecules and lipids that ..
  13. Olfactory and behavioral responses of kissing bugs (Reduviidae: Triatominae), vec
    John G Hildebrand; Fiscal Year: 2010
    ..We will use gas chromatography (GC) coupled to electrophysiological recording from olfactory receptor cells (ORCs) to characterize the ..
  14. Regulation of Muscle ATP Synthase Beta Subunit Metabolism in Obesity
    Christos S Katsanos; Fiscal Year: 2013
    ..Because measurement of stable isotopic enrichment of individual proteins is not practical using traditional gas chromatography-mass spectrometry approaches for proteins that are found in small amounts in skeletal muscle, we have ..
  15. GABA-active neurosteroids in contextual fear responses
    Graziano Pinna; Fiscal Year: 2011
    ..Allo content will be quantified in discrete corticolimbic areas using gas chromatography-mass spectrometry (GC-MS), which allows measurement of femtomolar amounts of neurosteroids in laser ..
  16. Hydrogen Sulfide in Newborn Cerebral Circulation
    Charles W Leffler; Fiscal Year: 2013
    ..activity, we propose a novel analytical method of H2S detection, identification, and quantification by gas chromatography-mass spectrometry...
  17. Gastrointestinal Smooth Muscle in Health &Disease
    Joseph H Szurszewski; Fiscal Year: 2012
    ..Our methods will include immunohistochemistry, confocal microscopy and 3D volume reconstruction methodology, gas chromatography to measure H2S production, microelectrode recordings from smooth muscle cells, myenteric and prevertebral ..
  18. A Miniaturized GC with MEMS-Enabled Selective Preconcentration for Monitoring Exp
    Masoud Agah; Fiscal Year: 2013
    DESCRIPTION (provided by applicant): This research proposal is aimed at developing a miniaturized gas chromatography system with selective adsorption capability to identify air hazardous pollutants (HAPs) found in transportation-related ..
  19. A Genetic Study of Blood Metabolites and Their Relationship To Diabetes Risk.
    HARALD HEINZ HERBERT GORING; Fiscal Year: 2013
    ..We propose here to use two-dimensional gas chromatography and time-of-flight mass spectrometry (GCxGC-TOFMS) to generate metabolomic profiles of blood plasma...
  20. SOLID STATE RADIATION CHEMISTRY OF DNA
    Jeffrey J Hayes; Fiscal Year: 2012
    ..Stable end products will be quantified by high performance liquid chromatography (HPLC), gas chromatography/mass spectrometry (GC/MS), and liquid chromatography/mass spectrometry (LC/MS)...
  21. Early Insulin Therapy and Development of ARDS
    Michelle Ng Gong; Fiscal Year: 2011
    ..tumor necrosis factor-a, interleukin-6 and Von Willebrand Factor antigen will be determined by liquid and gas chromatography and by ELISA...
  22. Intralumental Effect on Cholesterol Absorption/Synthesis
    James Heubi; Fiscal Year: 2009
    ..will include state-of-the art techniques utilizing stable isotopes and isotope ratio mass spectrometry, gas chromatography. Translational studies in animals will be used including novel techniques to measure fat absorption as well ..
  23. Mycobacterium Tuberculosis Lipoarabinomannan In Vivo
    Libin Shi; Fiscal Year: 2013
    ..Therefore, our structural studies will rely heavily on use of more sensitive tests such as Gas Chromatography-Mass Spectrometry (GC-MS), enzyme digestion, and mapping of the oligosaccharides with Electrospray ..
  24. Metabolic and Endocrine Effects of Bariatric Surgery
    Judith Korner; Fiscal Year: 2013
    ..intermediates before and after VLCD, LAGB, RYGB, and SG in subjects with and without DM using liquid and gas chromatography and mass spectrometry in collaboration with Dr. Burant and the U of Michigan Metabolomics Core...
  25. Fetal Exposure to Environmental Toxicants and Child Outcome
    ENRIQUE MAPUA OSTREA; Fiscal Year: 2012
    ..study cohort, as well as house dust from their homes, will be collected and analyzed for pesticides by gas chromatography/ mass spectrometry to detect ongoing exposure...
  26. CHEMISTRY SUPPORT SERVICES TO THE ENVIRONMENAL TOXICOLOGY PROGRAM
    Reshan Fernando; Fiscal Year: 2010
    ..were procured and comprehensively characterized using ultra high performance liquid chromatography (UPLC), gas chromatography, elemental analysis, and infrared spectroscopy...
  27. CONTROL OF NEONATAL CIRCULATION
    Charles W Leffler; Fiscal Year: 2013
    ..CO production in vivo and in vitro is identified and quantified by gas chromatography-mass spectrometry...
  28. Thermo Vantage triple quadrupole with FAIMS and Accela UPLC
    KYM FRANCIS FAULL; Fiscal Year: 2010
    ..UPLC brings liquid chromatographic resolution close to that attainable with capillary gas chromatography, and is an important development for high sensitivity work, high throughput work, and for work with complex ..
  29. Endocannabinoid signaling and aging
    MATTHEW SIMON GILL; Fiscal Year: 2013
    ..Using gas chromatography-mass spectrometry (GC-MS) I have identified multiple endocannabinoid (EC) molecules in C...
  30. PHYSIOLOGY OF FLUOROCARBON OXYGEN TRANSPORT
    LELAND CLARK; Fiscal Year: 1992
    ..will be measured by specific gravity, ultracentrifugation, centrifugation, combustion, and electron capture gas chromatography. Organ fluorocarbon content will be measured by combustion and by gas chromatography...
  31. Neuroactive Steroids and Allostasis Induced by Ethanol/Stress
    A Leslie Morrow; Fiscal Year: 2013
    ..neuronal and extracellular neuroactive steroid levels will be examined by immunohistochemistry as well as gas chromatography-mass spectroscopy (GC-MS) analysis of microdialysates and/or tissue specimens, allowing investigation of ..
  32. Uncovering CD36-mediated oxidative and inflammatory pathways in progressive renal
    DARYL MIYOSHI OKAMURA; Fiscal Year: 2010
    ..K08 and will focus on: (1) defining the major oxidant pathways modulated by CD36 during chronic injury using gas chromatography and mass spectrometry, as well as elucidating the inflammatory pathways activated by CD36;(2) ..
  33. Identification of bacteria-associated cues that regulate hatching of Aedes aegypt
    Loganathan Ponnusamy; Fiscal Year: 2013
    ..coupled with chemical analytical techniques, including high-performance liquid chromatography and gas chromatography, and mass spectrometry...
  34. Defining the Impact of Lipid Synthesis and Turnover on Aging in C. elegans
    CARISSA OLSEN; Fiscal Year: 2013
    ..methods to assay the turnover and synthesis of the acyl chains and phospholipid head groups in membranes via gas chromatography/mass spectrometry (GC/MS) and liquid chromatography/mass spectometry (LC/MS), respectively...
  35. Myxococcus xanthus signaling and cell fate
    LAWRENCE JOSEPH SHIMKETS; Fiscal Year: 2013
    ..will be purified using bioassays involving mutants that are unable to produce the signals, identified by gas chromatography/mass spectrometry, then synthesized to prove that the synthetic structure has the activity...
  36. NEUROSTEROID MODULATION OF ETHANOL WITHDRAWAL SEVERITY
    David J Rossi; Fiscal Year: 2013
    ..Finally, preliminary experiments with gas chromatography-mass spectrometry (GC-MS) simultaneously quantified hippocampal neurosteroid levels and determined that ..
  37. Propofol in Exhaled Breath: Real-time Detection by Surface Acoustic Wave Sensors
    DONN MICHAEL DENNIS; Fiscal Year: 2012
    ..Unfortunately, the current research tools (e.g., proton transfer reaction-mass spectroscopy [PTR-MS], gas chromatography- mass spectroscopy [GC-MS]) used to measure propofol in breath consists of sensitive, large, very expensive ..
  38. Rapid Real-Time High-Sensitivity Trichloroethylene Vapor Analyzer
    BRUCE ARAM RICHMAN; Fiscal Year: 2013
    ..ring-down spectroscopy (CRDS) and diffusion time-of-flight (DiTOF) incorporating stationary phases (as in gas chromatography). CRDS provides extremely sensitive detection while diffusion with stationary phase provides specificity...
  39. Food Safety and Security Monitoring Project (U18), FERN
    Abul Anisuzzaman; Fiscal Year: 2013
    ..Laboratories in the following instrumental areas of testing: (1) Analysis of food or food products by (a) Gas Chromatography-Mass Spectrometry (GC-MS) and (b) Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS);to screen and ..
  40. Non-Alcoholic Fatty Liver Disease Ethnicity and Hepatic Metabolism
    Jeffrey D Browning; Fiscal Year: 2010
    ..hepatic metabolism by using stable isotope techniques in combination with nuclear magnetic resonance and gas chromatography-mass spectroscopy and will test the hypothesis that primary NAFLD is the result of multiple metabolic ..
  41. Saliva Analyzer for Diagnosing SRD Patient Drug Use
    Stuart Farquharson; Fiscal Year: 2012
    ..a sample is screened with immunoassay test kits, and if a drug is present, it is confirmed and quantified by gas chromatography - mass spectrometry (GC-MS)...
  42. Identification of biomarkers of fatty acid intake
    Hannia Campos; Fiscal Year: 2002
    ..Technological advances in gas chromatography and fatty acid peak identification software now make it possible to study specific fatty acids in large ..
  43. PHARMACOKINETICS AND PHARMACOLOGICAL EFFECTS OF ALCOHOL AFTER BARIATRIC SURGERY
    Marta Yanina Pepino; Fiscal Year: 2013
    ..Blood alcohol concentrations (BAC) will be determined by the gold standard technique of headspace gas chromatography and these concentrations will be compared with the BAC estimated from breath samples...
  44. PLASMA PROTEINS: MARKERS OF CHEMICAL EXPOSURE
    GHULAM ANSARI; Fiscal Year: 1991
    ..of chemically modified amino acids in blood proteins such as al-proteinase inhibitor and hemoglobin using gas chromatography-mass spectrometry...
  45. Protective Glycopeptide Immunodeterminants of Ehrlichia chaffeensis
    Jere W McBride; Fiscal Year: 2010
    ..chaffeensis infection. The gp47 glycan composition, linkage, and attachment site(s) will be determined by gas chromatography and mass spectrometry...
  46. Optimized Metabolite Extraction, Separation, and Identification for Metabolomics
    Andrew Patterson; Fiscal Year: 2013
    ..for other tissues and biofluids as well as platforms including nuclear magnetic resonance spectroscopy and gas chromatography coupled with mass spectrometry...
  47. Achieving a Nationally Integrated Food Safety System: ISO/IEC 17025 Accreditati
    Jason C White; Fiscal Year: 2013
    ..All sample extracts will be analyzed simultaneously by gas chromatography with mass spectrometric detection (GC/MS/MS) and by liquid chromatography with mass spectrometric detection (..
  48. Elucidating the mechanism of particulate methane monooxygenase
    Megen A Culpepper; Fiscal Year: 2013
    ..Once the O2 binding has been characterized, enzyme kinetics using gas chromatography and stopped-flow spectroscopy will be determined...
  49. A Compact and Low Cost High-Precision Carbon Isotope Ratio Monitoring Tool for Ro
    Nabil Saad; Fiscal Year: 2009
    ..develop a fast, simple, and inexpensive replacement for IRMS while meeting or exceeding the performance of Gas Chromatography-Combustion-IRMS (GC-C-IRMS) by coupling a low-cost isotopic CRDS analyzer to a compact Gas Chromatography- ..
  50. New Hampshire Food Safety and Security Monitoring Project - Chemistry
    CHRISTINE LOUISE BEAN; Fiscal Year: 2013
    ..support, we have enhanced our contaminated product- tampering response to include semi-volatile poisons by gas chromatography/mass spectrometry (GC-MS), non-volatile poisons by liquid chromatography/mass spectrometry/mass spectrometry ..
  51. A Breath-based Naltrexone Adherence Tool to Manage Narcotic-addicted HIV patients
    DONN MICHAEL DENNIS; Fiscal Year: 2012
    ..g., 2-butanone) exhaled in breath, 2) a miniature gas chromatography-metal oxide sensor (mGC-MOS) has been created to measure ketones in human breath, 3) multiple taggants can ..
  52. Mass Spectrometry-Based Biomarker Discovery
    Victor J Thannickal; Fiscal Year: 2012
    ..Using highly sensitive and specific gas chromatography MS we have recently characterized and validated specific markers of oxidative stress in human plasma...
  53. Mass Spectrometry platform for Oxidative Biomarker Discovery in Type 1 Diabetes
    Subramaniam Pennathur; Fiscal Year: 2009
    ..Using highly sensitive and specific gas chromatography MS we have recently characterized and validated specific markers of oxidative stress in plasma of humans ..
  54. Neural mechanisms of olfactory reward value processing in the human brain
    James D Howard; Fiscal Year: 2013
    ..With the first experiment (Aim1), we will use a combination of gas chromatography/mass spectrometry (GC/MS) equipment, functional magnetic resonance imaging (fMRI), and olfactory ..
  55. CHEMISTRY SUPPORT SERVICES TO THE ETP FOR AIDS THERAPEUTICS
    Reshan Fernando; Fiscal Year: 2009
    ..UPLC, gas chromatography, elemental analysis were used to assess the purity of zivudine, lamavudine, nevirapine, and nelfinavir and ..
  56. Clinical Validation of a Biofilm Signature for Early Caries Activity Assessment
    ANDREA GONCALVES FERREIRA ZANDONA; Fiscal Year: 2012
    ..of 5-19 to determine: (1) if there are marked differences between dental biofilm metabolic activities using gas chromatography - mass spectrometry (GC-MS) on a site-specific analysis that may categorize C-F surfaces compared to ..
  57. FDA FERN Chemistry Cooperative Agreement 2010
    STEVEN SOBEK; Fiscal Year: 2013
    ..In addition, these goals will be met within the context of four key project areas: 1. The use of Gas Chromatography\Mass Spectrometry (GC\MS) analysis. 2. The use of Liquid Chromatography\Mass Spectrometry (LC\MS) analysis...
  58. Agilent 6550 QTOF system for U of Utah
    JAMES ERIC COX; Fiscal Year: 2013
    ..We are pursuing a number of medically related metabolomics projects currently, from basic research in understanding the causes of disease to actual patient studies. ..
  59. A pocket-sized device for personal exposure level assessment
    Erica Forzani; Fiscal Year: 2013
    ..to a lab for detailed analysis using sophisticated but expensive and difficult-to-operate equipment, such as gas chromatography coupled with mass spectrometry...
  60. Mass Informatics of Two Dimensinoal Gas Chromatography Time-of-flight Mass Spectr
    Xiang Zhang; Fiscal Year: 2012
    ..A particularly important platform for metabolomics is two-dimensional gas chromatography time-of- flight mass spectrometry (GCxGC/TOF-MS) that provides both high precision and extended capacity for ..
  61. MASS SPECTROMETER SYSTEM AND ACCESSORIES
    ALAN NIES; Fiscal Year: 1990
    This proposal is for the purchase of a gas chromatography/mass spectrometry/data system that is capable of operating in both chemical ionization, negative ion mode (GC/NICI-MS) and electron impact ionization, positive ion mode...
  62. TERPENE CYCLASES: FUNCTIONAL DOMAINS AND STRUCTURES
    JOSEPH NOEL; Fiscal Year: 2003
    ..state kinetic analysis, product profiling by argentation thin-layer chromatography (arg-TLC) and radiometric gas chromatography (r-GC), product identification by gas chromatography/mass spectrometry (GC-MS), and x-ray crystallography to ..
  63. CALCIUM CHANNEL BLOCKERS--KINETICS, ACTION & METABOLISM
    STEPHEN BAI; Fiscal Year: 1992
    ..Nifedipine plasma levels will be measured by electron capture-gas chromatography. The optical isomers of propranolol, its active metabolite 4-hydroxypropranolol, verapamil and its active ..
  64. OXIDATIVE STRESS IN SEIZURE INDUCED NEURONAL INJURY
    WOLF DIETRICH DETTBARN; Fiscal Year: 1999
    ..These compounds were increased in DFP-induced muscle injury. We can detect F2-isoprostanes by gas chromatography/negative-ion chemical ionization...
  65. TWO TYPES OF MONOAMINE OXIDASE
    Jean Shih; Fiscal Year: 2007
    ..of the[unreadable] neuromodulator B-phenylethylamine (MAO B substrate) will be determined by[unreadable] Gas Chromatography/Mass Spectrometry (GC-MS). These levels will be[unreadable] correlated with MAO A and B catalytic activity...
  66. CONTROL OF ENDOCANNABINOID RELEASE IN VIVO
    Daniele Piomelli; Fiscal Year: 2003
    ..We propose to use microdialysis and gas chromatography/mass spectrometry techniques to test the hypothesis that endogenous cannabinoid substances are released in ..