Chemistry. Polychlorinated biphenyls (PCBs) are a family of 209 chemicals (congeners), each with a common two-ring structure and one to ten substituted chlorine atoms (ATSDR, 1998). PCBs were used commercially as insulating material in electrical equipment because of their unusual chemical properties: they resist oxidation and
Table 28.1. PCB residue levels in edible fish, bivalves, and crustaceans from the New York-New Jersey Harbor Estuary, Fall, 1993
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