Sixty-eight fish samples were collected from typical epidemic areas of schistosomiasis prevalence. The contents of 12 CB congeners in fish samples were measured using GC/MS technique. The results indicated that 1,3-DIC, 1,4-DIC, 1,2-DIC and HCB were the most predominant CB congeners in the samples from the studying area. The source of HCB was PCP (pentachlorophenol), which was used to control the schistosomiasis prevalence, used in study area. And DIC came from the degradation of HCB and the articles of daily use. The geometric average of CBs in muscle ranged from 2731.50 to 7811.23 ng·g-1 lipid weight, while the summarized concentration of CBs in fish gonads, brains, kidneys, livers ranged from 2557.89 to 4640.05 ng·g-1 lipid weight, 2423.18 to 3329.61 ng·g-1 lipid weight, 1628.05 to 4667.76 ng·g-1 lipid weight and 704.92 to 1086.96 ng·g-1 lipid weight, respectively. When compared to other studies in China and other countries, the concentrations of CBs in these fish samples were at a relatively high level.
Keywords: CBs; epidemic areas of schistosomiasis prevalence; organs of fish; pollution characteristics; source.