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Design and performance evaluation of a two-stage resistively-heated thermal modulator for GC × GC

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Back matter

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Analytical Methods Vol - 2 Issue - 6

Analytical Methods Vol - 2 Issue - 5

Analytical Methods Vol - 2 Issue - 4

Analytical Methods Vol - 2 Issue - 3

Analytical Methods Vol - 2 Issue - 2

Analytical Methods Vol -1

Design and performance evaluation of a two-stage resistively-heated thermal modulator for GC × GC

Content Provider	Royal Society of Chemistry (RSC)
Author	Fix, Cory Sacks, Richard Libardoni, Mark Waite, J. Hunter
Copyright Year	2010
Abstract	The design and performance evaluation of a two-stage resistively-heated thermal modulator that does not use any cryogenic consumables is described. A commercially available piece of stainless-steel wall coated capillary column is used as the modulator. Cooling of the modulator is provided by a two-stage refrigeration unit with an external heat exchanger and a closed-loop recirculating air system. The modulator is resistively heated by sending a current pulse through each stage of the modulator tube. Studies evaluating the modulator trapping efficiency, cooling efficiency, desorption efficiency, and resultant peak shape are presented and discussed. Performance evaluation of this modulator is compared to similar single-stage modulators, both qualitatively and quantitatively, and has exceeded the previous data reported for the single stage versions. GC × GC chromatograms of a C6-C20 n-alkane mixture, a petroleum sample, and a 38-component mixture of aliphatic, aromatic, and halogenated volatile organic compounds are provided. This two-stage modulator proves to be a viable alternative to commercially available modulators which require large amounts of cryogenic fluids.
Starting Page	936
Ending Page	943
Page Count	8
File Format	HTM / HTML PDF
ISSN	17599660
Volume Number	2
Issue Number	7
Journal	Analytical Methods
DOI	10.1039/c0ay00090f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Aliphatic compound Heat exchanger Cryogenics Volatile organic compound Refrigeration Petroleum
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry Engineering Chemical Engineering

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