Abstract
Abstract Subsurface seawater samples from 12 locations in Tianjin and Dalian harbours were analyzed for butyltin species by gas chromatography-atomic absorption spectrophotometry, and the presence of butyltin species was reported for the first time in these two harbours. Butyltin species were determined in most sampling locations. The concentrations of butyltin species in Tianjin Harbour were higher than those in Dalian Harbour. Some water samples in Tianjin Harbour contained the highly toxic tributyltin at concentrations which could cause growth retardation on chronic exposure to a sensitive organism (rainbow trout yolk sac fry). The concentrations of butyltin species were higher in areas of heavy boating and shipping traffic. This is consistent with butyltin use as an antifouling agent in some paints for boats, ships and docks.
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