ICP-OES法测定复合肥料中五种重金属元素

Determination of five kinds of heavy metals elements in compound fertilizer by inductively coupled plasma optical emission spectrometry(ICP-OES)

基于全自动消解仪优化程序,以HCl-HNO 3-HClO 4消解体系消解复合肥料样品,建立了全自动消解-电感耦合等离子体发射光谱仪(ICP-OES)法测定复合肥料样品中铬、砷、汞、镉、铅5种重金属元素的新方法。结果表明,复合肥料中5种元素校准曲线的线性r>0.999,此方法的检出限在0.0012μg/g^0.0098μg/g,用混合溶液标准物质GBW(E)083363进行验证,相对标准偏差(RSD)在0.5%~4.9%,加标回收率为96%~101%,各元素的测定值与标准值吻合。

With HCl-HNO 3-HClO 4 digestion system,a new method of full-automatic digestion-inductively coupled plasma optical emission spectrometry(ICP-OES)was established for determination of 5 elements in compound fertilizer,including Cr,As,Hg,Cd and Pb,based on optimized full-automatic digestion.The correlation coefficients of calibration curve was less than 0.999 in compound fertilizer,with detection limit between 0.0012μg/g^0.0098μg/g,RSD between 0.5%~4.9%,and recovery in the range from 96%to 101%,by using the new method to analysis the national standard samples of GBW(E)083363.The determination value of each element was consistent with the standard value.