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广东近江牡蛎(Crassostrea rivularis)有机氯农药残留与健康风险评估

Keywords: 有机氯农药,牡蛎消费,致癌风险,接触风险

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Abstract:

为了探讨有机氯农药对牡蛎食用安全性的影响,对2003年春季在广东沿岸15个贝类养殖海域采集的近江牡蛎(Crassostrearivularis)样品,用气相色谱仪-石英毛细管色谱柱(长30m,内径0.32mm,膜厚0.25μm)-微电子捕获检测器,测定持久性有机氯农药的残留量,然后进行健康风险评估。结果显示:α-BHC、β-BHC、γ-BHC、pp′-DDD、pp′-DDE、pp′-DDT、艾氏剂、狄氏剂、异狄氏剂、硫丹、七氯和环氧七氯的残留量均低于澳大利亚、美国、日本的食品安全限量;接触风险指数ERI和致癌风险指数CRI分别为4×10-7~4×10-2、1.17×10-5~8.97×10-5;每天每千克人体可以食用的广东近江牡蛎软组织重量,按可接受的致癌风险(CRI≤10-4)推算为4~51g,15个采样点总体平均为9g;按可接受的接触风险(ERI≤1)推算为37~410g,总体平均为68g。

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