江汉平原养殖黄鳝肌肉中重金属残留评估与分析
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公益性行业(农业)专项(201003076);国家农产品质量安全风险评估重大专项(GJFP2014009)


Heavy metal residues in the muscle of Monopterus albus from Jianghan Plain
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    摘要:

     于2012—2013年在江汉平原采集了养殖黄鳝样品,测定了黄鳝肌肉中的Cu、Zn、Pb、Cd、Hg、As、Se和Cr 8种主要重金属含量。8种重金属在黄鳝肌肉中的残留量分别是220.11~394.39、9 644.00~19 377.53、0~239.30、1.05~12.38、0.49~4.46、91.19~274.54、371.02~1 106.94和826.73~2 247.96 μg/kg。除了采自石首市黄鳝肌肉样品中Cr含量超出国家食品中重金属卫生标准限量外,其他各采样点黄鳝肌肉中重金属含量均低于限量标准。研究结果显示,8种重金属元素中Zn在黄鳝肌肉中的含量最高;黄鳝肌肉中Cu和Zn含量之间存在极显著正相关(P<0.01),其他重金属含量之间无显著相关性;潜江、沙市、公安、监利和枝江的黄鳝肌肉中Se的负荷比最大,其余采样点Cr的负荷比最大。均值污染指数表明,除仙桃黄鳝肌肉中重金属含量为正常背景水平,其余各采样点均处于轻污染水平。本研究从重金属含量角度评价江汉平原黄鳝食用安全性,可为有关部门制订措施提供参考。

    Abstract:

     Investigation of residues of eight main heavy metal(Cu, Zn, Pb, Cd, Hg, As, Se and Cr) content in the muscle of cultured Monopterus albus collected from Jianghan Plain during the years of 2012—2013 was conducted to evaluate the status of food safety. The investigation covered ten different points or cities distributed in the main production region. As a result, the residue levels for Cu, Zn, Pb, Cd, Hg, As, Se and Cr were in the range of 220.11~394.39, 9 644.00~19 377.53, 0~239.30, 1.05~12.38, 0.49~4.46, 91.19~274.54, 371.02~1 106.94 and 826.73~2 247.96 μg/kg, respectively. The residue levels were below the tolerance limit levels established by the Ministry of Health of China, with the exception of Cr in the samples from Shishou City.Variance analysis showed that the residue of Zn was the highest among the eight heavy metal elements. Only a significant positive correlation (P<0.01) was detected between Cu content and Zn content in the muscle of Monopterus albus. The Se load ratio in the muscle of Monopterus albus was the highest among the eight heavy metal elements from Qiangjiang, Shashi, Gongan, Jianli and Zhijiang, and the Cr was the highest from the other sampling sites. Average pollution index suggested that all the sampling sites suffered from mild pollution except Xiantao which was below the normal background level. This study appraised the safety of consumption of Monopterus albus from Jianghan Plain from the viewpoint of heavy metal contents, and provided reference for the relevant departments in formulating measures. 

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张涛,陈建武,何力*.江汉平原养殖黄鳝肌肉中重金属残留评估与分析[J].中国渔业质量与标准,2015,5(1):19-27. ZHANG Tao, CHEN Jianwu, HE Li*. Heavy metal residues in the muscle of Monopterus albus from Jianghan Plain[J]. Chinese Fishery Quality and Standards,2015,5(1):19-27.

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