ICP-MS法测定钼铁中Sb,Cu,Sn,Si,P元素的研究

Study on the determination of impurities elements of Sb,Cu,Sn,Si and P in ferromolybenum by ICP-MS

将钼铁样品用HNO3低温溶解完全后,加入内标元素45Sc,采用内标法,用ICP-MS仪进行测定.文中讨论了基体钼对测定的影响.本方法的加标回收率为98.0%～102.5%,相对标准偏差RSD为1.6%～3.5%.本方法具有简便、快速、准确等特点,可用于钼铁样品中微量杂质元素的分析.

A method for the determination of impurities is developed. After the ferromolybdenum was dissolved elements of Sb, Cu,Sn,Si and P in ferromolybenum completely in nitric acid at low temperature, adding internal standard elements of ^45Sc, by use of internal elements calibrated method, the content of Sb,Cu, Sn,Si and P in ferromolybdenum is determined directly by ICP-MS. The effect of matrix molybdenum element on the determination is discussed. The standard recovery of this method is 98.0%-102. 5%, the relative standard deviation is 1.6%-3.5%. This method is simple, rapid and accurate, can be used in the testing of ferromolybdenum.