平阳县近岸海域养殖水产品重金属与农药监测

2007年6月、9月、12月和2008年3月对平阳县近岸海域养殖水产品中的重金属和农药含量进行了调查.结果表明：水产品中的各污染质量分数分别为Hg 0.013～0.084μg·g-1,As ND～3.0μg·g-1,Pb ND～0.48μg·g-1,Cd 0.002～0.579μg·g-1,Cu ND～11.7μg·g-1,Cr ND～4.1μg·g-1,六六六ND～0.001 5μg·g-1和DDT为ND～0.173μg·g-1.参照《农产品安全质量无公害水产品安全要求》标准发现,平阳县近岸海域养殖水产品中超标项主要有Cd、As和Cr,另外重金属和农药残留量除DDT、Cr外,其余污染物质量分数均呈甲壳类、贝类〉鱼类.同时,采用危害指标公式探讨水产品摄取量与健康风险之关系,并估算其每日可接受安全量,得出每人以平均体重为60kg折算,若水产品中的砷含量为3.0μg·g-1时,建议每人每日可接受安全量为42.9g·d-1.

Safety Monitoring and Analysis on the Heavy Metal and Pesticide in Aquatic Products from Pingyang Coastal Waters

The content of heavy metal and pesticide in aquatic products of Pingyang coastal waters is investigated in June,September,December of 2007 and March of 2008.The results indicate that the contents of the pollutants per mass-unit are： Hg： 0.013～0.084 μg·g-1;As： ND～3.0 μg·g-1;Pb： ND～0.48 μg·g-1;Cd： 0.002～0.579 μg.g-1;Cu： ND～11.7 μg.g-1;Cr： ND～4.1 μg.g-1;666： ND～0.001 5 μg·g-1 and DDT： ND～0.173 μg.g-1（wet mass）.By collating against ‘Safety requirements for agricultural product-Safety requirements for non-environmental pollution aquatic products’,it is found that the pollutants not in line with the stated criterion are Cd,As and Cr.Except DDT and Cr,the content of pollutants in the crustacean and mollusk is found to be higher than that in the fish.At last,the formula of Hazard Index（HI） is used to examine the relationship between the aquatic product consumption and health risks,and to estimate the safe daily acceptable amount.If the average body weight is 60 kg per person and the arsenic level of aquatic product is below 3.0 μg·g-1,the daily intake of aquatic product of 42.9 g·d-1 is suggested.