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 (420Kb)
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| Hiroaki Tao | |
| Hydrospheric Environmental Protection Department, | |
| National Institute for Resources and Environment, | |
| Agency of Industrial Science and Technology, MITI | |
| 16-3 Onogawa, Tsukuba, Ibaraki 305-8569, Japan | |
| Tel: +81-298-61-8333 Fax: +81-298-61-8308 | |
| E-mail: hiroaki@nire.go.jp |
14,994,000 Yen
(FY 1999; 7,494,000 Yen)
The sensitivity of GC combined with ICP-MS (GC-ICP-MS) was improved more than 1000 fold by using PTV method and by operating a shield torch at normal plasma conditions. Consequently, 1) Occurrence of tributyltin (TBT) and triphenyltin (TPhT), below 1 ppt in the East China Sea and in the western parts of the Sea of Japan was clarified. 2) Pollution of octyltins, used as plastic stabilizer, was observed. 3) Butyltins and phenyltins (except for TPhT) were found to exist as dissolved form, but TPhT and octyltins were found to exist as particulate form. 4) Principal component analysis revealed the origin of pollution, i.e., whether it came from antifouling paint or plastic stabilizer. 5) Contamination of organotins is not restricted in local harbors and bays, but is spread over a large area, and therefore should be considered in a global scale. The accumulation of organochlorine compounds (OCs) in squid, Todarodes pacificus, was investigated. Since concentrations of OCs in liver displayed a significant linear correlation with the concentrations in surface seawater, it was suggested that it may be possible to estimate the concentrations of OCs in seawater from levels of α-HCH and PCB congener (Cl5- Cl9) in squid liver.
Marine pollution, Organotin, GC-ICP-MS, PCBs, Squid Watch