APPLICATION OF C-13-LABELED POLYCHLORINATED BIPHENYL CONGENER-153 AS INTERNAL STANDARD IN THE GAS-CHROMATOGRAPHIC MASS-SPECTROMETRIC ANALYSIS OF POLYCHLORINATED-BIPHENYLS

We developed a method of qualitative and quantitative GC-MS analysis o f polychlorinated biphenyls (PCBs) in soil samples, to be able to dete rmine the biodegradation efficiency for individual PCBs. C-13(12)-Subs tituted PCB 153 was used as internal standard. The analyses were perfo rmed on a DB-5 capillary column. The identification procedure was base d on the correlation analysis of the measured and published relative r etention r(12) data using [C-13(12)]PCB 153 instead of octachloronapht halene (OCN). [C-13]PCB 153 was also used for quantification of indivi dual PCBs in soil samples.