Results 301 to 310 of about 453,529 (334)

GAS CHROMATOGRAPHY/ MASS SPECTROMETRY

Analytical Chemistry, 1986
Abstract Gas chromatography/mass spectrometry (GC/MS) is useful in analyzing mixtures of organic compounds. This article commences with a description of the principles of mass spectrometry and gas chromatography. It provides information on the procedures of mass spectrum interpretation, and describes the experimental procedure of and ...
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Supersonic gas chromatography/mass spectrometry

Rapid Communications in Mass Spectrometry, 2001
Abstract A new gas chromatography/mass spectrometry (GC/MS) system was designed and evaluated which we have named ‘Supersonic GC/MS’. It is based on a modification of a commercially available GC/MS system to include a supersonic molecular beam (SMB) MS interface.
A, Amirav, A, Gordin, N, Tzanani
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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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Gas Chromatography-Mass Spectrometry

2006
Gas chromatography-mass spectrometry (GC-MS) has been used in hormone assays particularly for steroids in biological fluids. The combination of GC with MS exploits the high-resolving power of gas chromatography to separate closely related molecules, and the ability of the MS to provide precise data for identification and quantification of the separated
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Integrated gas chromatography-mass spectrometry

Quarterly Reviews of Biophysics, 1973
Mass spectrometric analysis of organic compounds was in the early 1950s done mostly for quantitative determination of petroleum products. The use of the mass spectrometer for qualitative analysis of solid organic material samples was shown by O'Neil & Wier (1951) and since then a continuous increase in mass spectrometric studies of different ...
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Gas chromatography-mass spectrometry

1982
The complexity and wide range of organic acids present in urine, and other biological fluids, makes their quantification and positive identification a difficult problem. Although chromatographic characteristics of individual compounds, such as retention data on gas, liquid and thin-layer chromatography, are extremely useful indicators of probable ...
R. A. Chalmers, A. M. Lawson
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Reaction gas chromatography/mass spectrometry

Mass Spectrometry Reviews, 1990
The material reported in this review demonstrates the considerable utility of reaction GC/MS for the structure elucidation of organic compounds within mixtures. Of special interest is the possibility for the synthesis of isotopically labeled compounds directly in the course of analysis because it allows one to obtain new structurally informative ...
Anzor I. Mikaya, Vladimir G. Zaikin
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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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Gas chromatography—mass spectrometry

1990
Combined gas chromatography—mass spectrometry (GC—MS) is probably the most comprehensive instrumental analytical technique available to the scientist in food analysis at present. The technique is well established in food science, and a predominant area of application is in food safety, where reliable information on food contaminants, e.g.
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Gas chromatography-mass spectrometry combinations

Journal of Physics E: Scientific Instruments, 1980
Modern systems consist of 3 units: gas chromatography, mass spectrometry and data systems. The authors consider the operation of the 3 units independently and show the power of the combined system and its modes of operation.
A M Greenway, C F Simpson
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