基体分离ICP-AES法测定金属锇粉中的杂质元素

Determination of Impurities in Osmium Powder by ICP AES Using Matrix Separation

本文介绍了用浓硝酸在２００ ℃下溶解样品，同时把锇氧化成易挥发的氧化物离去并用氢氧化钠吸收，残液用ＩＣＰ－ＡＥＳ测定的方法。方法检测限为０．００５～０．１３４ μｇ·ｍ Ｌ－ １ ，回收率为９１％ ～１１２％ ，精密度小于３％ ，同时测定１８种杂质元素，具有简单快速和准确度高的优越性。

An inductively coupled plasma atomic emission spectrometry method has been developed for the determination of impurities in osmium powder.The sample was dissolved in nitric acid at 150—200 ℃.Osmium was oxided and its oxide vapour was absorbed by NaOH.The residual solution was then analyzed by ICP AES.The determination limit of the method is 0 005—0 134 μg·mL -1 .The recovery range of the method is 91%—112%.The precision of the method is less than 3%.This method can be used to determine 18 elements simultaneously.It is simple,rapid and precise.