电感耦合等离子体质谱法测定地质样品中的稀土元素

摘要

以“HF-HNO3-H2SO4+王水”体系消解样品，国家一级标准物质替代待测元素标准溶液制备标准工作曲线，采用电感耦合等离子体质谱仪（ICP-MS）测定地质样品中的稀土元素。试验结果表明，该方法的准确度、精密度和检出限均符合规范要求，在实际应用中大大降低了基体效应带来的干扰，消除了配置标准工作曲线引进的误差，具有结果准确、易操作等优点，适用于批量测定地质样品中的稀土元素。%HF-HNO3-H2SO4+aqua regia system was applied to complete sample digestion.National Primary Reference Material instead of standard solution of the measured elements was employed to make the standard work curve,and then we used inductively coupled plasma mass spectrometry (ICP-MS) to determination of rare earth elements in geological samples.The results indicated that the accuracy,precision,detection limit of the method are conform to the requirements of the specification,meanwhile,it greatly reduces the matrix effect in the practical application of interference to some degree,and eliminate of errors that were introduced during the period of making standard work curve.In addition,the method had the advantage of accurate results and easy operation, which can be widely applied to determination of amounts of rare earth elements in geological samples.