Multidimensional gas chromatographic separation of selected PCB atropisomers in technical formulations and sediments

Autor: Ján Hrouzek, Pat Sandra, Jaap De Zeeuw, Radoslav Novakovsky, Eva Benická, Ján Krupčík
Rok vydání: 1996
Předmět:
Zdroj: Journal of High Resolution Chromatography. 19:95-98
ISSN: 1521-4168
0935-6304
DOI: 10.1002/jhrc.1240190207
Popis: A simple dual-column gas chromatographic system with a six-port switching valve has been used to separate the atropisomers of PCB congeners 84, 91, and 95 in technical PCB formulations and in extracts of soil and river sediment. A capillary column coated with a methylphenylsiloxane stationary phase (CP-Sil 8) was used as the first column, for retention window selection, and a permethylated β-cyclodextrin (ChirasilDex) capillary column as the main separation column. Because peak overlap could not be eliminated by optimization of column temperature, the enantiomeric ratios of PCB congeners could not be determined from the original chromatograms. The correct enantiomer ratio was determined from the peak areas obtained by deconvolution of the chromatograms. Whereas the PCB atropisomers considered were present in equal concentrations in the technical PCB formulations, analysis of a river sediment sample confirmed different residual concentrations of the atropisomers of congener 95.
Databáze: OpenAIRE
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