ICP-AES、HG-AFS联用测定不锈钢食具容器铬、镍、镉、铅、砷迁移量

DETERMINATION OF EXTRACTABLE Cr,Ni,Cd,Pb AND As IN STAINLESS STEEL CUTLERY FOR FOODSTUFFS BY ICP-AES AND HG-AFS

[目的]建立电感耦合等离子体原子发射光谱和原子荧光分光光度计联用测定不锈钢食具容器众多元素的迁移量。[方法]用4%醋酸溶液浸泡取自不锈钢食用器皿钢片样品,在室温条件下浸泡24h,将浸泡液按6:1浓缩。通过优化试验确定实验条件,用电感耦合等离子体发射光谱仪准确测定浸泡液中Cr、Ni、Cd、Pb的浓度,用原子荧光光度法测定浸泡液中的As含量。[结果]实验过程操作简单,多种元素同时测定节约试验时间。各元素的检出限(μg/mL)分别为Cr(0.015),Ni(0.015),Cd(0.005),Pb(0.030),As(0.001)。回收率在90%～105%之间。

This paper covers the simultaneous determination of extractable Cr, Ni, Cd, Pb and As in stainless steel cutlery for foodstuffs by ICP-AES and HG-AFS. Samples sheared from stainless steel cutlery were dipped in 4% acetic acid solution about 24 hours in room temperature condition, and then were condensed to 6:1. Concentrations of Cr, Ni, Cd, Pb and As in the marinated solution were determined by ICP-AES and AFS, in which the operation conditions were determined through optimum test. The process of test was not only simple but test time was saved due to amount element were determined at the same time. The determination limit was 0.015 for Cr, 0.015 for Ni, 0.005 for Cd, 0.030 for Pb and 0.001 for As with the recoveries of 90%-105%.