Levels of synthetic musks; Bromocyclene and PCBs in eel (Angullla anguilla) and PCBs in sediment samples from some waters of Berlin/Germany

The purpose of this study was to identify firstly the extent of contaminati on both of the aquatic biota and of sediments and secondly any regional dif ferences in the concentrations of these compounds. In 1996, polychlorinated biphenyls (PCBs, including their coplanar congeners) were measured in 58 e el and 50 sediment samples. Furthermore, the veterinary pharmaceutical brom ocyclene and the nitro musks were determined in 84 (1995) and 122 (1996) ee l samples. Polycyclic musk fragrances were additionally determined in analy ses carried out in;1996. The mean values obtained during the two measurement periods (1995 and 1996) were 24 and 12 mu g/kg fw. for musk xylene, 41 and 39 mu g/kg fw. for musk ketone, 14 and 7 mu g/kg fw. for bromocyclene and, in 1996, 592 mu g/kg fw , for HHCB (maximum: 4131 mu g/kg fw.). Decreasing contamination levels are seen for musk xylene and bromocylene but not for musk ketone. This tendenc y, and the high amounts of polycyclic musk fragrances in the edible parts o f eel show that these musks are widely being used in place of nitro musks a nd that they reach the aquatic system via waste waters, especially those of sewage treatment plants. The mean levels of PCBs in the biota samples of a highly polluted area were 1227 mu g/kg fw. or 119 pgTEQ/g (sediment: 203 mu g/kg dw.) and of a sligh tly polluted area 340 mu g/kg fw. or 49 TEQ/g (sediment: 47 mu g/kg dw.). ( C) 1999 Elsevier Science Ltd. All rights reserved.