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Multiplex gas chromatographyThe principles of the multiplex gas chromatography (GC) technique, which is a possible candidate for chemical analysis of planetary atmospheres, are discussed. Particular attention is given to the chemical modulators developed by present investigators for multiplex GC, namely, the thermal-desorption, thermal-decomposition, and catalytic modulators, as well as to mechanical modulators. The basic technique of multiplex GC using chemical modulators and a mechanical modulator is demonstrated. It is shown that, with the chemical modulators, only one gas stream consisting of the carrier in combination with the components is being analyzed, resulting in a simplified instrument that requires relatively few consumables. The mechanical modulator demonstrated a direct application of multiplex GC for the analysis of gases in atmosphere of Titan at very low pressures.
Document ID
19900036140
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Valentin, Jose R.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Publication Information
Publication: LC - GC
Volume: 7
Issue: 3, 19
ISSN: 0888-9090
Subject Category
Inorganic And Physical Chemistry
Accession Number
90A23195
Distribution Limits
Public
Copyright
Other

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