Abstract
Tributyltin, triphenyltin and their degradation products were measured in 23 kinds, 47 species of fish and crustacean in 1993 at Tokyo Bay . Concentrations in crustacean were in the range of 16-56 ng TBTCI/g wet, 14-106 ng DBTCI/g wet, 6-53ng MBTCI/g wet, 5-50 ng TPTCI/g wet, 5-28 ng DPTCI/g wet, <1-4 ng MPTCI/gwet. Concentrations in fish muscle were 6-423 ng TBTCI/g wet, 5-35 ng DBTCI/g wet, <1-32 ng MBTCI/g wet, 20-146 ng TPTCI/g wet, <1-28 ng DPTCI/g wet, <1-26 ng MPTCI/g wet and those in fish liver were <3-245 ng TBTCI/g wet, 62-234 ng DBTCI/g wet, 14-94 ng MBTCI/g wet, <3-388 ng TPTCI/g wet, <3-172 ng DPTCI/ g wet, <3-19 ng MPTCI/g wet. TBT in fish liver was low compared with that in muscle, but TPT was detected in the same level. The present results show that relatively high concentration of organotin compounds in fish were still detected in Tokyo Bay and TBT was quickly metabolized in fish liver, while the degradation or derivatization of TPT was relatively slow. The data also suggests that TBT contamination of some fish in Tokyo Bay may further continue through food chain, because the concentration of organotin compounds in crustacean samples were relatively high.
