氟化氢铵消解-电感耦合等离子体质谱(ICP-MS)法测定地球化学样品中的锂、铷、铯

Determination of Lithium,Rubidium and Cesium in Geochemical Samples by Inductively Coupled Plasma Mass Spectrometry(ICP-MS)with Ammonium Fluoride Digestion

建立了氟化氢铵消解样品,电感耦合等离子体质谱(ICP-MS)法测定地球化学样品中锂、铷和铯的方法。方法经国家土壤和水系沉积物标准参考物质验证,方法的检出限锂0.012μg/g、铷0.038μg/g、铯0.045μg/g,相对标准偏差锂0.41%~1.3%、铷0.32%~0.94%、铯1.3%~2.5%,能够满足地球化学样品分析测试的质量要求。并且有效地避免了铷和铯在样品消解过程中的挥发损失。方法具有操作简便、测试成本低、分析效率高等特点,适合于批量样品的分析测试。

A method for the determination of lithium,rubidium and cesium in geochemical samples by inductively coupled plasma mass spectrometry(ICP-MS)after digestion with ammonium hydrogen fluoride was established.The method was verified by the national standard reference material of soil and stream sediment.The detection limits of lithium,rubidium and cesium were 0.012μg/g,0.038μg/g and 0.045μg/g,respectively.The precision of lithium is 0.41%-1.3%,rubidium is 0.32%-0.94%,cesium is 1.3%-2.5%.The quality requirements of geochemical sample analysis and testing can be met.Moreover,the volatilization loss of rubidium and cesium in the sample digestion process is effectively avoided.The method has the advantages of simple operation,low test cost and high analysis efficiency,which is suitable for the analysis and test of batch samples.