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

Residue and Risk Assessment of Organochlorine Pesticides in Jinjiang Oyster ( Crassostrea rivularis ) from the Coast of Guangdong, China

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(Crassostrea rivularis)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。

In order to study the effect of organochlorine pesticides associated with consumption of oyster, samples of Jinjiang oyster （ Crassostrea rivularis ） were collected at 15 sites along the coast of Guangdong, China, during spring in 2003, certain chlorinated pesticides in the oyster body were determined by a gas chromatography equipped with an electron capture detector and a quartz capillary columns （30 m length×0.32 mm i.d. and 0.25 μm film thickness）, risk of chlorinated pesticides to human health was evaluated. The detection results showed that the residue of α-BHC, β-BHC, γ-BHC, pp′-DDD, pp′-DDE, pp′-DDT, aldrin, dieldrin, endrin, endosulfan, heptachlor and heptachlor-epoxide was less than the sanitation criterion published by Australia, Japan and USA. The exposure risk index （ERI） was 4×10^-7～4×10^-2, and the carcinogenic risk index （CRI） was 1.17×10^-5～8.97×10^-5. It was suggested that the safe consumption of soft tissue of the oyster by one kilogram body weight of a person every day was 37～410 g with average of 68 g according to acceptable exposure risk （ERI ≤ 1）, or 4～51 g with average of 9 g according to acceptable carcinogenic risk indexes（CRI ≤ 10^-4）.