利用Agilent 6890气相色谱仪测定了大港电厂潮间带水质、表层沉积物及泥螺体内多氯联苯含量。结果表明，该区域水质、沉积物和泥螺体内多氯联苯含量分别为16．74、21．9、24．2 ng／g。急性毒性试验结果表明，多氯联苯对泥螺的96 h LC50值为92．7mg／kg ，无可见影响添加量为50 mg／kg。泥螺对多氯联苯的累积效应研究表明，泥螺在不同时间内对多氯联苯的BSAF值不同，泥螺第7 d和第12 d的生物累积因子分别为1．29和0．78，随着时间的延长，泥螺体内多氯联苯累积量出现先升后降的趋势。%The water quality , and polychlorinated biphenyls (PCBs ) levels were determined in the sediments and mud snail Bullacta exarata sampled from the intertidal Dagang Power Plant using gas chromatography Agilent 6890 .The results showed that there were PCBs levels at concentration of 16 .74 ng/g in the water ,21 .9 ng/g in the sediment and 24 .2 ng/g in the mud snails .The acute toxicity of PCBs to the mud snail revealed that the 96 h LC50 value was 92 .7 mg/kg for the snail ,with NOEC value of 50 mg/kg .The PCBs accumulation in the mud snails showed that the PCBs BSAF values were found to be changed with time ,with BSAF values of 1 .29 on the seventh day and 0 .78 on the twelfth day ,indicating that the PCBs accumulation in the mud snail body was increased first and then decreased .
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