舟山渔场主要海产品中甲基汞污染状况调查分析
Analysis of Methylmercury Contamination in Major Seafoods from Zhoushan Fishery
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摘要:
目的 了解舟山渔场主要海产品中甲基汞污染状况,为海产品的安全监督管理提供依据。 方法 于2007-2009年,随机抽取282份海产品进行甲基汞含量检测分析。 结果 舟山渔场主要海产品的甲基汞超标率为2.84%。不同类别海产品中甲基汞蓄积量差异有统计学意义(F=25.990,P<0.001)。不同类别海产品中甲基汞的单因子污染指数由大到小依次为:藻类(0.38)、软体类(0.11)、鱼类(0.10)、甲壳类(0.08)。不同类别海产品中甲基汞超标率差异有统计学意义(χ2 = 20.960,P<0.001)。不同年份的甲基汞超标率差异无统计学意义(χ2 = 5.226,P>0.05);不同年份的甲基汞蓄积量差异也无统计学意义(H=0.076,P>0.05)。 结论 舟山渔场海产品甲基汞污染水平总体较低,海藻类产品中甲基汞蓄积量、污染指数和超标率均高于其他海产品,要加强安全监测。 Abstract:Objective To recognize the situation of methylmercury contamination in the major seafoods collected from Zhoushan fishery. Methods A total of 282 samples randomly in fishery market and breeding sites were collected from the year 2007 to 2009, and the methylmercury contamination in these seafoods were analyzed. Results The rate of exceeding the limit of methylmercury was 2.84% in the major seafoods from Zhoushan fishery. One-way ANOVA analysis on the accumulation of methylmercury in different categories of seafood obtained the F equal to 25.990, P<0.001. Assessing the intake safety of methylmercury in various categories of seafood with the single-factor contamination index, the series were:seaweed(0.38), marine molluscs(0.11), sea fish(0.10), marine crustaceans(0.08). The result of Chi square test of the exceeding rate was :χ2 = 20.960, P<0.001. The trend of methylmercury contamination rate among calender year was χ2 = 5.226, P>0.05. Kruskal-Wallis rank sum test was H=0.076, P<0.05. Conclusion The overall contamination of methylmercury in seafood was still at a low level, however the contamination index for seaweed were higher than the others. The enchancement of monitoring should be needed.
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