ICP-AES分析河蚌肉中14种微量元素

Analysis of Fourteen Trace Elements in Mussel Tissue by ICP-AES

应用ICP-AES测定河蚌肉中14种微量元素,同时进行ICP-AES仪器工艺参数优化试验。结果表明:适当降低射频(RF)发生器功率和增加雾化器压力,有利于易电离元素(如K、Na元素)测试;适当增加RF功率和降低雾化器压力有利于中等易电离和难电离元素,如Cr、Cd等其他12种元素测试。样品提升量的改变,对各元素测试影响并不太大。元素测试的相关系数范围为0.9994—0.9999,检出限范围为0.3—18.5 ng.mL-1,回收率范围为93.6%—104.8%之间,RSD为8.0%。河蚌肉中含有丰富的矿物元素,如:K、Na、Ca、Mg及其他一些人体健康所必需的微量元素,如Mn、Fe、Cu、Zn、Ni、Cr。但过多食用时,应考虑有害元素Cd、As、Pb潜在的污染危险性,和一些微量元素的过量性问题。

The determination of fourteen trace elements in mussel tissue was investigated by ICP-AES,and the optimal experiment of parameters for ICP-AES instrument was studied.There was favorable to determine easy ionized elements,such as K and Na,with the RF power decreasing and nebulization pressure increasing.In contrast,that was suitable for measuring difficult ionized elements,such as Cr and Cd or twelve other elements with the RF power increasing and nebulization pressure decreasing.The change of sample speed had no effect on each analytical element.The correlation coefficients for elements were in range of 0.9994—0.9999,and detection limits were between 0.3ng·mL-1 and 18.5ng·mL-1 with recoveries were 93.6%—104.8%,and RSD was 8.0%.There are rich mineral elements in mussel tissue,such as K,Na,Ca and Mg,and some essential trace elements,such as Mn,Fe,Cu,Zn,Ni and Cr,for human health in mussel tissue.But it should be noticed about the potential pollutions of toxic elements Cd,As and Pb,as well as excessive problems of trace elements in mussel tissue,when excessively consumed mussel tissue.