主成分分析法研究多棘海盘车中的微量元素

建立测定12种(Cr、Mn、Co、Ni、Cu、Zn、As、Se、Cd、Cs、Ba、Pb)微量元素含量的方法,确定其特征性元素及地域分布特征.采用微波消解-电感耦合等离子体质谱法测定6个不同产地的多棘海盘车样品中微量元素的含量,并且运用主成分分析法研究多棘海盘车中的特征性元素,同时对不同地点的多棘海盘车样品进行综合评价.通过与我国食品中的Pb、Cr和Cd元素标准限量值的比较,表明6个产地的多棘海盘车的Cr元素含量均超过标准限量值,主成分分析结果表明Pb、Mn、Ba、Cs为多棘海盘车的特征性元素,通过与已报道文献中所测定海星中特征性元素含量的对比,发现所测定Pb、Mn元素含量均部分超出已报道值,通过分析主成分得分和综合得分,表明微量元素对山东青岛即墨的多棘海盘车质量影响最大,对黄岛的样品质量影响最小,文中所建立的方法及分析为海星的质量评价与控制提供了部分参考依据.

Principal component analysis of trace elements in Asterias amurensis

In order to establish a determined method for determination of 12 kinds of trace elements (Cr ,Mn ,Co ,Ni ,Cu ,Zn ,As ,Se ,Cd ,Cs ,Ba ,Pb) in A sterias amurensis ,to study the contents and distribution of trace elements in those samples , the authors determined concentrations of trace elements in A sterias amurensis of 6 different origins by microwave digestion‐ICP‐MS .Besides ,they analyzed characteristic elements of A sterias amurensis by principal component analysis .In addition ,they did comprehensive evaluation of difference and compared the concentration of Pb ,Cr and Cd in national food safety regulation with these contents in A sterias amurensis .The results showed that the concentrations of Cr element in A sterias amurensis of 6 different origins were more than the national standard limit value in our country food . The result of principal component analysis showed that characteristic elements were Pb , Mn , Ba , Cs in A sterias amurensis . The determined concentrations of Pb and Mn were partly more than those reported values . The result showed that the concentrations of trace elements had the greatest impact on quality of comprehensive A sterias amurensis in Jimo ,but the least impact on that in Huangdao . It provided that quality evaluation and control about with a part of theoretical basis .