ANALYSIS OF PCDDS, PCDFS, PLANAR AND OTHER PCBS IN SEAWEED FROM JAPANESE COAST

PCDDs, PCDFs, planar and other PCBs were analyzed by high resolution G C-MS in four species of seaweed collected from Japanese coast. Two dif ferent methods were examined for sample extraction. Soxhlet extraction from dried sample (method 1) gave higher recovery than extraction fro m alkaline digested wet sample (method 2). PCDDs and related compound were detected from all samples. It was suggested that seaweed analyzed in this study were contaminated by PCDDs and PCDFs of industrial orig in such as combustion source, and the presence of natural dioxin could not be ascertained.