GLOBAL DISTRIBUTION OF TRIS(4-CHLOROPHENYL)METHANOL IN HIGH TROPHIC LEVEL BIRDS AND MAMMALS

This study presents levels of tris(4-chlorophenyl)methanol (TCP methanol) in marine mammals and bird eggs from the Arctic, Antarctic, Australia, and the East and West Coasts of North America. TCP methanol was detected in all the samples analyzed, except three milk samples (i.e., one Antarctic fur seal and two Australian sea lions). The highest levels of TCP methanol were recorded in polar bear (Ursus maritimus) livers at a geometric mean level of 5200-mu-g/kg (fat weight basis). TCP methanol was detected in samples from St. Lawrence marine mammals dating back to 1952. TCP methanol was significantly correlated with most other high molecular weight organochlorines. A previously unreported compound, tris(chlorophenyl)methane (TCP methane), was also identified in peregrine falcon eggs. Samples were analyzed by either electron capture GC or GC/MS. Identification of the TCP methanol was accomplished by its mass spectrometric characteristics and by comparison to a synthesized standard. TCP methane was identified by its mass spectral characteristics. The extensive distribution of TCP methanol suggests substantial input into the environment. The possible sources of the TCP methanol and TCP methane include optically active polymers, agrochemicals, and compounds used in the production of synthetic dyes.