Polychlorinated Biphenyls, Dibenzo-p-dioxins, and Dibenzofurans in Harbor Porpoises (Phocoena phocoena) Stranded on the Dutch Coast Between 1990 and 1993.

Congener-specific polychlorinated biphenyl (PCB) concentrations were determined in the blubber, kidney, and liver tissues of 22 harbor porpoises (Phocoena phocoena) stranded on the Dutch coast. For comparison, the PCB concentrations in blubber and liver samples of four porpoises from the vicinity of Greenland were investigated. In ten blubber samples, the non-ortho PCB concentrations were determined, while in four of these the levels of chlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) were analyzed.