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Stop-flow comprehensive two-dimensional gas chromatography with pneumatic switching.

Authors
  • Oldridge, Nathan
  • Panic, Ognjen
  • Górecki, Tadeusz
Type
Published Article
Journal
Journal of Separation Science
Publisher
Wiley (John Wiley & Sons)
Publication Date
Oct 01, 2008
Volume
31
Issue
19
Pages
3375–3384
Identifiers
DOI: 10.1002/jssc.200800265
PMID: 18798216
Source
Medline
License
Unknown

Abstract

A new method for performing comprehensive GC x GC in the stop-flow mode is presented. A device was used to pneumatically stop the flow in the first dimension ((1)D) (by applying pressure pulses at the junction between the two columns), while flow was maintained in the second dimension ((2)D). This allowed for better preservation of resolution in the (1)D of the GC x GC chromatograms, and the extension of the (2)D's separation space, reducing or eliminating the extent of wraparound. When increased flow rates in the (2)D were used, sensitivity enhancements were also observed.

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