Analysis of seven chlorobiphenyl congeners by multidimensional gas chromatography

Abstract

SummaryChlorobiphenyl congeners (CBs) are used as indicator compounds in analysis performed to determine whether or not PCB concentrations in food products,waste mineral oil, and environmental samples comply with the maximum levels permitted by legislation. Seven of these compounds have been checked for coelution with other CB congeners by means of a multidimensional gas chromatographic method utilizing a combination of two narrow bore columns, one coated with a conventional non-polar stationary phase and the other with a liquid crystalline (smectic) stationary phase.Peaks of the relevant CBs have been transferred, by heart cutting, from the non-polar column to the liquid crystal column, on which unambiguous separation from possible coeluting CB congeners was obtained. It has been shown that if the seven congeners are analyzed solely on a single, non-polar capillary column the results obtained for two of them may be affected by coelution of other compounds.

An 8-Year Study on the Elimination of PCBs and Other Organochlorine Compounds from Eel (Anguilla anguilla) under Natural Conditions

“…This method consists of a Soxhlet extraction, cleanup on alumina, and fractionation on silica, followed by a highresolution gas chromatographic (GC) analysis with electron capture detection (ECD). CB 138 is reported as CB138+163 because these analytes coelute on the CP-Sil 8 GC column that was used (16). For the indigenous eel, lower detection limits were obtained because, due to the low CB concentrations, a more concentrated sample extract was injected.…”

Multidimensional Gas Chromatographic Analysis of Toxaphene

“…This study presents a CHB congener-specific method using multidimensional gas chromatography (MDGC). The use of MDGC has shown to be very beneficial in the analysis of other complex mixtures such as polychlorinated biphenyls (PCBs) ( , ). By making sequential heart-cuts, it is possible to obtain a better estimation of the minimum number of CHBs present in a sample.…”

HRGC Separations of 160 Chlorobiphenyls in Technical Mixtures on Four Polar Narrow-Bore Columns

“…The DB-17 and the SIL-8MT-5 columns produced selected ion chromatograms somewhat similar to those of SIL-8 or SIL-13. Tentative peak assignments on DB-17 and SIL-8lHT-5 (CB:5,7,9,12,22,32,41,51,85, 102, 131, 135, 144, 146, 174, 175, 176, 197, 198,200) are also of a high level of confidence. BPX-70, however, produced rather different selected ion chromatograms and the tentative peak assignments for the low intensity peaks which sometimes co-elute with higher chlorinated congeners and therefore have some MS indifference (CBs: The ECD chromatograms of the A1016-A1262 mixture obtained with the four columnsDownloaded by [University of Sydney] at 13:36 03 January 2015 92 S. B0WADT et al…”