Effects of variation in modulator temperature during cryogenic modulation in comprehensive two-dimensional gas chromatography

Begnaud, Frédéric, Debonneville, Christian, Probst, Jean-Pierre, Chaintreau, Alain, Morrison, Paul D., Adcock, Jacqui L. and Marriott, Philip J. 2009, Effects of variation in modulator temperature during cryogenic modulation in comprehensive two-dimensional gas chromatography, Journal of separation science, vol. 32, no. 18, pp. 3144-3151.

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Title Effects of variation in modulator temperature during cryogenic modulation in comprehensive two-dimensional gas chromatography
Author(s) Begnaud, Frédéric
Debonneville, Christian
Probst, Jean-Pierre
Chaintreau, Alain
Morrison, Paul D.
Adcock, Jacqui L.
Marriott, Philip J.
Journal name Journal of separation science
Volume number 32
Issue number 18
Start page 3144
End page 3151
Total pages 8
Publisher Wiley - V C H Verlag GmbH & Co. KGaA
Place of publication Weinheim, Germany
Publication date 2009-09
ISSN 1615-9306
1615-9314
Summary Many modulation systems in comprehensive 2D GC (GC×GC) are based on cryogenic methods. High trapping temperatures in these systems can result in ineffective trapping of the more volatile compounds, whilst temperatures that are too low can prevent efficient remobilisation of some compounds. To better understand the trapping and release of compounds over a wide range of volatilities, we have investigated a number of different constant temperature modulator settings, and have also examined a constant temperature differential between the cryo-trap and the chromatographic oven. These investigations have led us to modify the temperature regulation capabilities of the longitudinally modulated cryogenic system (LMCS). In contrast to the current system, where the user sets a constant temperature for the cooling chamber, the user now sets the temperature difference between the cryo-trap and the chromatographic oven. In this configuration, the cooling chamber temperature increases during the chromatographic run, tracking the oven temperature ramp. This produces more efficient, volatility-dependent modulation, and increases the range of volatile compounds that can be analysed under optimal trap-and-release conditions within a single analytical run. This system also reduces cryogenic fluid consumption.
Language eng
Field of Research 039999 Chemical Sciences not elsewhere classified
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2009 WILEY-VCH Verlag GmbH & Co. KGaA
Persistent URL http://hdl.handle.net/10536/DRO/DU:30039134

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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