ICPAES直接测定地质样品中微量稀土元素

摘要

研究了基体元素对15个稀土元素的干扰，优化了ICP的工作参数，采用Na2O2碱熔处理样品，加入三乙醇胺、EGTA络合干扰离子，计算机离峰背景校正消除基体元素干扰，ICPAES法直接测定地质样品中15个微量稀土元素，方法的检出限为0.01～1.1 μg*g－1,精密度(RSD,n=8)为1.3 %～5.6 %，方法操作简便、快速，经对国家一级标准物质分析，结果与推荐值一致.%A sensitive method for direct determination of 15 rare earth elements in geochemical samples by ICPAES has been developed. Optimum condition and matrix elemental interference were studied.Experimental condition limit was 0.01～1.1 μg*g－1, the analytical results for standard reference materials were in good agreement with the certified values with precision of 1.3 %～5.6 % RSD (n=8).