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  • Title: Comprehensive two-dimensional supercritical fluid and gas chromatography with independent fast programmed heating of the gas chromatographic column.
    Author: Venter A, Rohwer ER.
    Journal: Anal Chem; 2004 Jul 01; 76(13):3699-706. PubMed ID: 15228344.
    Abstract:
    With comprehensive two-dimensional supercritical fluid and fast, independent temperature-programmed gas chromatography (SFCxGC), a polar column was used in the first dimension to achieve group-type analysis. The eluent of this separation was repetitively sampled and transferred to a fast, resistively heated gas chromatograph to obtain the boiling point distribution over the entire polarity separation. The SFC was operated isothermally with stopped flow to provide a sufficient time span for the GC analysis. The GC analysis had a typical cycle time of 1 min for the system demonstrated here. During this time, the GC column was independently heated at a rate of 450 degrees C/min to 250 degrees C and actively cooled again to -50 degrees C before the next GC injection took place. The analysis of petrochemical samples is presented to illustrate the technique.
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