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Comprehensive Flow Modulated Two-Dimensional Gas Chromatography System
Abstract:
Two-dimensional GC (GC x GC), a relatively new gas chromatographic technique, is being recognized for its powerful separation capabilities for the analysis of complex mixtures. The methodology involves the use of two capillary columns of
usually very different polarities installed in series. Between the two columns a device known simply as a flow modulator is installed and interfaced to an auxillary programmable control module (PCM) on an Agilent 7890A gas chromatograph through a three-way solenoid valve. In the flow modulator, analyte bands
from the first column are collected in a fixed volume channel and successively injected very quickly into the short second column in very narrow bands.[1] Any separation that occurs on the first column is preserved during transfer to the second column. In summary, GC x GC can greatly increase peak resolution and
peak capacity.
Keywords:
Comprehensive GC, GC x GC, 2D GC, flow modulation, 7890A, diesel fuel, kerosene, biodiesel, fast GC, thermal modulation, aromatics, technology
Publication Number:
5989-6078EN
Last Updated:
10/30/2009
Number of Pages:
4
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