Abstract
A method has been developed for the analysis of butyltin species and inorganic tin in sediments, and the presence of these compounds in sediments in Ontario is reported for the first time. Although inorganic tin occurred frequently in sediments collected around the province, butyltin species were found mainly in the sediments of harbors, reflecting earlier findings on their occurrence in water, with which these findings are compared. Tri-n-butyltin, the most toxic of the butyltin species to aquatic life, was present at 0.5 mg/kg (dry weight) in the top 2 cm of sediment in Toronto Harbour. In addition, tri-n-butylmethyltin and di-n-butyldimethyltin were found in the sediment of a few harbors, indicating that some butyltin species can be methylated in aquatic environments.
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