RESEARCH IN ENVIRONMENTAL-POLLUTION .4. IDENTIFICATION OF NON-O,O'-CL AND MONO-O,O'-CL SUBSTITUTED PCB CONGENERS IN MAIN RIVER FISH

6 Non-o,o'-Cl and 20 mono-o,o'-Cl substituted PCB congeners were identified in Main fish by GC-MS. For risk and hazard assessment the concentrations of these PCB's congeners were transformed into the corresponding TCDD equivalents (TE). It was found that the concentrations of the analysed coplanar PCB congeners in fish expressed in TE are by a factor of about 300 higher than those of the polychlorinated dibenzo-p-dioxins (PCDD's) and polychlorinated dibenzofuranes (PCDF's) in fish. Therefore, more attention must be directed towards the analysis of PCB's.