Results 211 to 220 of about 446,999 (263)

Combination gas chromatography‐mass spectrometry

Journal of the American Oil Chemists' Society, 1967
AbstractThe direct combination of gas‐liquid chromatography with mass spectrometry represents one of the most powerful techniques available for the analysis of complex mixtures of lipids. Principal advantages are the extremely small amounts of material required, the relative speed of analysis, and the wealth of molecular structural information ...
Leemans, F.A.J.M., McCloskey, J.A.
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Liquid Chromatography: Mass Spectrometry of Isoflavones

Journal of Medicinal Food, 1999
High-performance liquid chromatography (HPLC) or capillary electrophoresis (CE) is particularly suited to the separation and analysis of a wide range of biological compounds. When investigating such compounds in complex matrices (e.g., blood, tissue, urine, foods), specificity of the detection method becomes an important issue.
S, Barnes, C C, Wang, M, Smith-Johnson, M, Kirk   +3 more
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Frontal affinity chromatography—mass spectrometry

Nature Protocols, 2007
Frontal affinity chromatography (FAC) is a biophysical method for the discovery and characterization of molecular interactions in a flow-based system. Several different modes of analysis are possible by interfacing to the mass spectrometer, including robust single-compound characterizations as well as high-throughput screening of over 1,000 compounds ...
Ella S M, Ng, Nora W C, Chan, Darren F, Lewis, Ole, Hindsgaul, David C, Schriemer   +4 more
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Chromatography-mass spectrometry

Journal of Analytical Chemistry, 2011
The review describes the most significant achievements of Russian scientists during last 20 years in developments and improvements of methods combining mass spectrometry and gas chromatography or HPLC for the analysis of organic compounds of different origin in various matrices.
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Micellar electrokinetic chromatography-mass spectrometry

Journal of Chromatography A, 1997
The combination of micellar electrokinetic chromatography (MEKC) with mass spectrometry (MS) is very attractive for the direct identification of analyte molecules, for the possibility of selectivity enhancement, and for the structure confirmation and analysis in a MS-MS mode.
L, Yang, C S, Lee
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Chromatography, Mass Spectrometry

Chemical & Engineering News Archive, 1997
Even though more high-performance liquid chromatography (HPLQ) instruments are in use than are gas chromatography (GQ) units, GC is much more likely to be paired with mass spectrometry (MS) than is liquid chromatography (LC), according to the 1997 Analytical Instrument End User Study conducted by K. C. Associates, Wilmington, Del.
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Thin layer chromatography/mass spectrometry

Journal of Chromatography A, 2011
Thin layer chromatography (TLC)--a simple, cost-effective, and easy-to-operate planar chromatographic technique--has been used in general chemistry laboratories for several decades to routinely separate chemical and biochemical compounds. Traditionally, chemical and optical methods are employed to visualize the analyte spots on the TLC plate.
Sy-Chyi, Cheng, Min-Zong, Huang, Jentaie, Shiea   +2 more
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Introduction to Gas Chromatography-Mass Spectrometry

2013
Gas chromatography-mass spectrometry (GC-MS) is a technique of pivotal importance for the analysis of hormones in biological fluids. In consequence, it has gained relevance in clinical and endocrinological laboratories, providing reference analytical methods.
Alberto, Sánchez-Guijo, Michaela F, Hartmann, Stefan A, Wudy   +2 more
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Analysis of flavonoids in tablets and urine by gas chromatography/mass spectrometry and liquid chromatography/mass spectrometry

Rapid Communications in Mass Spectrometry, 1998
A method was developed for the analysis and characterization of quercetin and kaempferol in urine following ingestion of Ginkgo biloba tablets. The method utilized gas chromatography/negative ion chemical ionization mass spectrometry of the trimethysilyl derivatives of the flavonoids.
Watson, D. G., Pitt, A. R.
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Study on the photostability of guaiazulene by high‐performance liquid chromatography/mass spectrometry and gas chromatography/mass spectrometry

Rapid Communications in Mass Spectrometry, 2008
Abstract The photostability of guaiazulene (1,4‐dimethyl‐7‐isopropylazulene; GA), a natural azulenic compound used in cosmetic and health‐care products, as well as in pharmaceutical preparations, was investigated in solution (methanol, ethanol, acetonitrile), by different techniques: gas chromatography/mass spectrometry (GC/MS) and ...
FIORI, JESSICA, GOTTI, ROBERTO, A. Albini, V. Cavrini   +3 more
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