Results 251 to 260 of about 1,425,145 (305)

Isotopomer Analysis Using GC-MS

Metabolic Engineering, 1999
Knowledge of the complete isotopomer distribution represents the ultimate amount of information on the labeling pattern of a metabolite. One technique for measuring the isotopomer distributions is the analysis of the multiplet intensities arising from the 13C-13C couplings in NMR spectroscopy.
B, Christensen, J, Nielsen
openaire   +2 more sources

Analysis of Mouse Liver Metabolites by GC × GC–TOF MS

2014
Comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry (GC × GC-TOF MS) is a powerful analytical platform for analysis of metabolites in mouse liver. Metabolites are extracted using a solvent mixture of methanol/water (4:1, v/v). The metabolite extracts are analyzed on GC × GC-TOF MS after derivatization.
Xue, Shi, Xinmin, Yin, Xiang, Zhang
openaire   +2 more sources

Analysis of Cannabis Using Tenax-GC

Journal of the Forensic Science Society, 1985
Abstract Headspace volatiles of cannabis resin have been examined by gas chromatography using a capillary column. A new approach for the analysis of cannabis has been developed which involves the use of Tenax-GC for adsorbing a wide range of the volatile constituents.
A, Osman, B, Caddy
openaire   +2 more sources

Analysis of Alkaloids fromPhysalis peruvianaby Capillary GC, Capillary GC-MS, and GC-FTIR

Planta Medica, 1993
The alkaloid composition of the aerial parts and roots of PHYSALIS PERUVIANA was analysed by capillary GC (GC (2)), GC (2)-MS and GC (2)-FTIR. Eight alkaloids were identified, three of those alkaloids are 3beta-acetoxytropane and two N-methylpyrrolidinylhygrine isomers, which were not previously found in the genus PHYSALIS.
C, Kubwabo, B, Rollmann, B, Tilquin
openaire   +2 more sources

Comprehensive two‐dimensional gas chromatography (GC×GC) and GC×GC‐quadrupole MS analysis of Asian and American ginseng

Journal of Separation Science, 2003
AbstractExtracts of the roots of Panax (ginseng) species are analysed using comprehensive two‐dimensional gas chromatography. Comparison of comprehensive two‐dimensional chromatograms reveals the presence of numerous common components, and possible species‐specific components are also observed.
Robert A. Shellie, Philip J. Marriott, Carmen W. Huie   +2 more
openaire   +1 more source

Application to SFC-GC × GC to heavy petroleum fractions analysis

Fuel, 2013
Abstract The new multidimensional chromatographic instrument SFC-GC × GC enables the temporary storage of SFC fractions inside sampling loops for subsequent analyses by GC × GC. The interface was configured for the characterization of heavy petroleum fractions.
Thomas Dutriez, Didier Thiébaut, Marion Courtiade, Hugues Dulot, Fabrice Bertoncini, Marie-Claire Hennion   +5 more
openaire   +1 more source

GC/MS Analysis of Propylated Barbiturates

Journal of Analytical Toxicology, 1991
A simple and reproducible method for the analysis of barbiturates by GC/MS after derivatization with dimethylformamide dipropyl acetal is reported. The method is readily adapted to screening, confirmation, and quantitation.
openaire   +2 more sources

Polymer analysis using pyrolysis‐GC‐FTIR‐MS and GC‐AED

Journal of High Resolution Chromatography, 1991
AbstractVolatile pyrolysates of a methyl methacrylate‐butadiene‐styrene copolymer (MBS) have been analyzed using a capillary gas chromatograph equipped with a Fourier transform infrared detector in tandem with a mass selective detector, and a gas chromatograph‐atomic emission detector system.Among the volatile compounds observed were monomers used for ...
Rimiko Oguchi, Ayako Shimizu, Satoru Yamashita, Kenji Yamaguchi, Philip Wylie   +4 more
openaire   +1 more source

[Ocimun oil analysis by GC].

Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica, 2003
To establish GC methods for determining eugenol in Ocimun oil.The determination was effected by GC method, using Chromosorb WAW with 10% PEG-20M as the stationary phase and column temperature at 200 degrees C.The calibration curve was linear within the range of 2-10 mg.ml-1 of eugenol.
L L, Li, D M, Lai, F Y, Ye
openaire   +2 more sources

Non-Targeted Analysis of Petroleum Metabolites in Groundwater Using GC×GC–TOFMS

Environmental Science & Technology, 2013
Groundwater at fuel release sites often contains nonpolar hydrocarbons that originate from both the fuel release and other environmental sources, as well as polar metabolites of petroleum biodegradation. These compounds, along with other polar artifacts, can be quantified as "total petroleum hydrocarbons" using USEPA Methods 3510/8015B, unless a silica
Rachel E, Mohler, Kirk T, O'Reilly, Dawn A, Zemo, Asheesh K, Tiwary, Renae I, Magaw, Karen A, Synowiec   +5 more
openaire   +2 more sources