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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。
This article describes a method of dissolving a sample with concentrated nitric acid at 200 ° C while oxidizing osmium to a volatile oxide leaving and absorbing it with sodium hydroxide. The residue was analyzed by ICP-AES. The detection limit was 0.005 ~ 0.134 μg · m L -1, the recovery was 91% -112%, the precision was less than 3%, and 18 kinds of impurity elements were determined at the same time. The method has the advantages of simple and rapid and high accuracy .