微波消解原子荧光光度法测定花生样品中的汞

Determination of Mercury in Peanut by Microwave Digestion Atomic Fluorescence Spectrometry

采用微波消解技术—原子荧光光度法测定花生样品中痕量Hg。方法检出限为0.000 4μg/g,线性范围:0.001～6μg/g,相关系数r=0.999 95,相对标准偏差(RSD,n=7)4.84%～5.30%,加标回收率在91%～114%之间。实验证明:花生中有害元素Hg的含量远低于我国粮食(成品粮)总Hg允许限标准。方法简便、快速,结果准确、可靠,能够满足花生样品中痕量Hg的测定。

Trace Hg in peanut was determined by atomic fluorescence spectrometry（AFS） with microwave digestion. The detection limit of mercury was 0.000 4μg/g（n=11）, the linear range for mercury was 0.001-6 μg/g, the correlation coefficient was 0.999 95,and relative standard deviation （RSD,n=7） was in the range of 4.84%45.30%, the recovery of the method was in the range of 91.00%- 114.00%. The experiment results show that the concentration of Hg is lower than the maximum allowable level of Hg in our food standard.The proposed method is rapid and convenient, the result is accurate and reliable, and it is suitable for the determination of trace Hg in peanut.