电感耦合等离子体质谱法同时测定海带中的10种元素

Simultaneous Determination of 10 Elements in Laminaria Japonica by Inductively Coupled Plasma Mass Spectrometry(ICP-MS)

海带样品在硝酸溶液中经微波消解处理,采用电感耦合等离子体质谱仪同时测定其中10种元素(Mg、Ca、Cu、Zn、Mn、Fe、Cd、Cr、Pb、Hg)的含量,并考察了该方法的线性关系、检出限、精密度、加标回收率等指标。结果表明:海带中10种元素的线性关系良好,其相关系数r均大于0.999 2,加标回收率在88.0%~102.1%,相对标准偏差RSD在4.0%~6.8%。选择国家标准参考物质来验证该方法的准确度,10种元素的测定结果均在国家标准值允许范围内。该方法操作简便、分析速度快、回收率和精密度好、测定结果准确可靠,能满足海带中多种元素的同时测定分析,可为海带的质量控制和安全评价提供参考。

The contents of 10 elements(Mg,Ca,Cu,Zn,Mn,Fe,Cd,Cr,Pb,Hg)in Laminaria japonica samples were determined simultaneously by using the inductively coupled plasma source mass spectrometer after the treatment of microwave digestion in nitric acid solution,and the linear relationship,detection limit,precision and adding standard recovery of the method were also investigated.The results showed that the linear relationship of 10 elements in Laminaria japonica was good,the correlation coefficient r was all greater than 0.999 2,the adding standard recovery was 88.0%-102.1%,and the relative standard deviation(RSD)was 4.0%-6.8%.The national standard reference materials were selected to verify the accuracy of the method,finding that the determination results of 10 elements were all within the allowable range of national standard values.The method was simple to operate,and fast to analyze,with good recovery rate,high precision,and accurate&reliable determination results,which could satisfy the simultaneous determination and analysis of various elements in Laminaria japonica,and could provide reference for the quality control and safety evaluation of Laminaria japonica.