Shape-selectivity is a key factor in comprehensive two-dimensional gas chromatographic analysis of toxic PCBs

Marriott, P, Ong, C, Haglund, P and Harju, M 2001, 'Shape-selectivity is a key factor in comprehensive two-dimensional gas chromatographic analysis of toxic PCBs', Journal of Microcolumn Separations, vol. 13, no. 7, pp. 306-311.


Document type: Journal Article
Collection: Journal Articles

Title Shape-selectivity is a key factor in comprehensive two-dimensional gas chromatographic analysis of toxic PCBs
Author(s) Marriott, P
Ong, C
Haglund, P
Harju, M
Year 2001
Journal name Journal of Microcolumn Separations
Volume number 13
Issue number 7
Start page 306
End page 311
Total pages 6
Publisher Wiley InterScience
Abstract A number of toxic planar PCBs, that is, PCB 77, 105, 118, 126, 156, and 169, were successfully separated from other PCB congeners present in technical PCB formulations using comprehensive GC×GC. The planar PCBs were selectively retained using a liquid crystal column, which was used as the first-dimension column. A short and narrow bore (0.25 m×0.1 mm) nonpolar 5%-phenyl-methylpoly-siloxane column was used as the second-dimension column. A longitudinally modulating cryogenic system (LMCS) was used to modulate the first-dimension signal. Since the planar PCBs elute from the first column at relatively high oven temperatures they were rapidly eluted from the second column. Altogether, this resulted in a significant peak sharpening, and a 20-fold increase in the signal-to-noise ratio, as compared to standard one-dimensional GC. This column set also seems to separate seven frequently measured congeners, that is, PCBs 28, 52, 101, 118, 138, 153, and 180, from other major PCB congeners.
DOI - identifier 10.1002/mcs.10011
Copyright notice Copyright 2001 John Wiley & Sons, Inc.
ISSN 1040-7685
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