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There are two analytical methods for determination of organotin (tributyltin compounds (TBT) and triphenyltin (TPT) in environmental samples. The first method is performed by ECD-GC with a column treated with hydrobromic acid. The second method is performed by FPD-GC of alkylated samples. The analytical operation of the first method was mere simple than that of the second method, while the recovery (above 90%) and reproducibility (CV, below 5%) of the first method were almost same as those of the second method. From the results, we used the first method for analysis of organotin compounds in environmental samples. To clarify the pollution of organotin compounds in Sendai Bay, samples were collected from eight stations in the Bay, and were analyzed. The results showed that the inside of Sendai Port was more polluted with organotin compounds from ship-paints than the outside.

Study on Pollution of Organotin Compounds in Sendai Bay.