杭州湾南岸小海鲜和滩涂中多氯联苯残留

目的探讨杭州湾南岸小海鲜食品和滩涂环境中多氯联苯的污染水平及其相关性。方法2010—2011年沿杭州湾南岸的6个滩涂养殖区采集7种小海鲜食品和相应的滩涂沉积物，采用气相色谱-质谱联用仪测定所采集海鲜食品及滩涂环境样品中多氯联苯含量，并分析海鲜与滩涂样品中多氯联苯污染水平的相关性。结果7大类880份小海鲜食品中多氯联苯残留量为43.69~147.14 μg/kg，环境沉积物多氯联苯残留量为8.41~25.87 μg/kg，各养殖区域的小海鲜和沉积物多氯联苯含量差异有统计学意义（P<0.05）；沉积物中多氯联苯含量与小海鲜体内多氯联苯水平呈正相关关系（P<0.05），并在生物体内不断富集放大。结论杭州湾南岸小海鲜食品和滩涂环境中均检出多氯联苯残留，小海鲜中多氯联苯污染与环境中多氯联苯残留有关。

Polychlorinated biphenyls in seafood and tidal-flat environment of south of Hangzhou Bay

ObjectiveTo study polychlorinated biphenyls(PCBs)pollution level in seafood and tidal-flat environment of the south of Hangzhou Bay.MethodsSeven kinds of seafood and tidal-flat sediments were collected from six tidal-flat farms in south of Hangzhou Bay from 2010 to 2011.The contents of PCBs were determined with gas chromato-graphy-tandem mass spectrometry(GC-MS/MSO)and the correlation between PCBs and seafood and tidal-flat pollution was analyzed.ResultsConcentration ranges of PCBs in 880 samples of 7 kinds of seafood were 43.69-147.14 μg/kg.Concentration ranges of PCBs in tidal-flat sediments were 8.41-25.87 μg/kg.There were significant differences in the content of PCBs of seafoods and tidal-flat sediments from different tidal-flat farm areas(P<0.05).The content of PCBs in seafood was significantly correlated with tidal-flat sediments(P<0.047)and the enrichment of PCBs in biological systems was observed.ConclusionResidues of PCBs are detectable in seafoods and tidal-flat sediments from the south of Hangzhou Bay and the PCBs pollution of seafoods is correlated to that of tidal-flat.