Results 341 to 350 of about 1,704,789 (385)

Characteristic fingerprints and volatile flavor compound variations in Liuyang Douchi during fermentation via HS-GC-IMS and HS-SPME-GC-MS.

Food Chemistry, 2021
Yi Chen, Pao Li, Luyan Liao, Yeyou Qin, Liwen Jiang, Yang Liu   +5 more
semanticscholar   +1 more source

A Review: Uses of Gas Chromatography-Mass Spectrometry (GC-MS) Technique for Analysis of Bioactive Natural Compounds of Some Plants

, 2017
Chromatography is the term used to describe a separation technique in which a mobile phase carrying a mixture is caused to move in contact with a selectively absorbent stationary phase.
A. F. Al-Rubaye, I. Hameed, Mohanad Jawad Kadhim   +2 more
semanticscholar   +1 more source

Derivatives suitable for GC-MS

Chemistry and Physics of Lipids, 1978
Abstract The preparation of derivatives is often advantageous or necessary for GC-MS, for a variety of reasons. In respect of GC, these include the need for conferring volatility or stability; the improvement of chromatographic behaviour or separation; information on functional groups; and provision for selective detection.
Simon J. Gaskell, Charles J. W. Brooks, Andrew G. Smith, Charles G. Edmonds   +3 more
openaire   +2 more sources

Characterizing the volatile compounds of different sorghum cultivars by both GC-MS and HS-GC-IMS.

Food Research International, 2021
Xiaojing Fan, Xin Jiao, Jinguang Liu, Meng Jia, C. Blanchard, Zhongkai Zhou   +5 more
semanticscholar   +1 more source

Determination of Pyrethroid Insecticides in Environmental Samples by GC–MS and GC–MS–MS

2013
Abstract Pyrethroid insecticides are widely used in very different areas. In spite of their regulation, they are present in the environment at low concentrations. Recently, some studies found them in biological tissues at low concentrations, which required the use of the most sensitive techniques for their detection and quantification.
Damià Barceló, Damià Barceló, Cayo Corcellas, Ethel Eljarrat   +3 more
openaire   +2 more sources

GC‐MS rehabilitiert Absinth

Nachrichten aus der Chemie, 2009
AbstractAbsinth, umgangssprachlich grüne Fee genannt, hat den Ruf eines anregenden, stimulierenden bis inspirierenden Kultgetränks. Bisher war die These verbreitet, dass der bicyclische Monoterpen‐ Keton‐Aromastoff Thujon der Wermutspirituose zu diesen Wirkungen verhelfe. Dies hat die analytische Chemie jetzt widerlegt.
Thomas Kuballa, Dirk W. Lachenmeier
openaire   +2 more sources

Comparison of Aroma-Active Volatiles in Oolong Tea Infusions Using GC-Olfactometry, GC-FPD, and GC-MS.

Journal of Agricultural and Food Chemistry, 2015
The aroma profile of oolong tea infusions (Dongdingwulong, DDWL; Tieguanyin, TGY; Dahongpao, DHP) were investigated in this study. Gas chromatography-olfactometry (GC-O) with the method of aroma intensity (AI) was employed to investigate the aroma-active
JianCai Zhu, Feng Chen, Lingying Wang, Yunwei Niu, Dan Yu, Chang Shu, Hexing Chen, HongLin Wang, Zuobing Xiao   +8 more
semanticscholar   +1 more source

Study of cycloparaffins by GC/MS

Petroleum Chemistry U.S.S.R., 1984
Abstract 1. 1. A GC/MS method was developed for the structural differentiation of cyclo-parffins, based on a dehydrogenation reaction in the GC/MS system (catalyst 20% Pt/C; reaction temperature 320°C; chromatographic separation in a mixture of 95% helium and 5% hydrogen). 2. 2.
V. M. Vdovin, Vladimir G. Zaikin, Mikaya Anzor I, E.Kh. Kurashova, P.I. Sanin, I.A. Musayev, L. P. Medvedkova   +6 more
openaire   +2 more sources

Computational Prediction of Electron Ionization Mass Spectra to Assist in GC/MS Compound Identification.

Analytical Chemistry, 2016
We describe a tool, competitive fragmentation modeling for electron ionization (CFM-EI) that, given a chemical structure (e.g., in SMILES or InChI format), computationally predicts an electron ionization mass spectrum (EI-MS) (i.e., the type of mass ...
Felicity Allen, Allison Pon, Russ Greiner, D. Wishart   +3 more
semanticscholar   +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   +3 more sources