Murai Ryota, Sugimoto Atsuko, Tanabe Shinsuke, Takeuchi Ichiro
Department of Life Environment Conservation, Faculty of Agriculture, Ehime University, Tarumi, Matsuyama, Ehime, Japan.
Chemosphere. 2008 Dec;73(11):1749-56. doi: 10.1016/j.chemosphere.2008.09.004. Epub 2008 Oct 23.
The measurement of organotins in the various biotas of coastal food webs with stable nitrogen isotope ratios (delta(15)N), which increase 3.4 per thousand per trophic level, can provide a biomagnification profile of organotins through food web. In this study, various biological samples were collected from three localities in Western Japan between 2002 and 2003 for analyses. Tributyltin (TBT) and triphenyltin (TPT) were still detected with a maximum of 99.5 and 8.7 ng wet weight g(-1), respectively. Unlike TBT, significant biomagnification of TPT through the food web (expressed by delta(15)N) was found in all three localities. The log transformed octanol-water partition coefficient (log K(ow)) of TPT of 2.11-3.43 was overlapped by, but was slightly lower than, that of TBT of 3.70-4.70. Thus, this study demonstrates that although these chemicals have a log K(ow) lower than 5, at least TPT undergoes significant biomagnification through the food web.
