乳化液直接进样ICP-MS法测定润滑油中的金属含量

摘要

An analytical method using ICP-MS for the determination of trace metals in lubricating oils emulsified by TritonX-100 is established.After the experimental conditions and instrumental parameters were optimized and the internal standard solutions are added,the emulsified samples were then introduced directly into the plasma.The addition of internal standard is to eliminate the matrix effect caused by samples emulsified and standard solutions.The inorganic-metallic standard solution is used for calibration instead of expensive organic-metallic standards.The established method shows the advantages of easy-handle,good precision and accuracy.The recoveries are 90％-110％.The RSD of all elements is less than 7.0％.The results of this method are in good agreement with those obtained by organic-metallic standard solution.%建立了乳化液直接进样ICP-MS法测定润滑油中多种金属元素含量的分析方法.将样品经过Tri-tonX-100乳化后引入到等离子体中,通过优化实验条件确定ICP-MS仪器的最佳操作参数,采取加内标方式消除基体效应.该方法使用廉价的无机金属标准溶液,简单快速,精密度和准确度较高,加标回收率在90％～110％,相对标准偏差小于7.0％.用该方法测定润滑油样品与用有机样品直接进样方法的结果基本一致.