HG-AFS测定铅-锑合金中的硒

Determination of Selenium in Lead-Antimony Alloy by Hydride Generation-Atomic Fluorescence Spectrometry

建立氢化物发生-原子荧光光谱法测定铅-锑合金中硒的分析方法。试样经33%硝酸和酒石酸溶解,硫酸沉淀分离基体铅元素,在40%盐酸介质中直接测定样品中的硒。考察了测定的最佳条件、铅及共存元素对测定的影响。两个标样的方法相对标准偏差为分别为6.52%—9.34%。准确度和精密度均能满足分析需要,具有较强的实用性。

A analytical method was established for the determination of selenium in lead-antimony alloy by hydride generation-atomic fluorescence spectrometry.The sample was dissolved by 33%nitric acid and tartaric acid,and matrix lead was eliminated by lead sulfate precipitation,and selenium was directly measured in the medium of 40%hydrochloric acid.The influences of optimum conditions,lead and coexistent elements on the determination of selenium were investigated.The relative standard deviations were 6.52%-9.34%.The accuracy and precision of results meet the demands,and the method is practical.