Abstract
The organic sulfur compounds usually contained in crude oil were used as a marker of oil pollution in shellfish. The oyster (Crassostrea gigas) and mussel (Mytitus edulis) were caught in the Seto Inland Sea of Japan. Capillary-column gas chromatography/mass spectrometry (GC/MS) of extracts showed the presence of organic sulfur compounds of dibenzothiophene and alkyl dibenzothiophenes (C1–C3). The concentration factor of organic sulfur compounds in the oyster and mussel was determined by gas chromatography using a flame photometric detector.