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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。
Determination of Selenium in Pb - Sb alloy by hydride generation - atomic fluorescence spectrometry. The sample was dissolved in 33% nitric acid and tartaric acid, and the lead was separated by sulfuric acid precipitation to determine the selenium in the sample directly in 40% hydrochloric acid medium. The optimum conditions for the determination, the influence of lead and coexisting elements on the determination were investigated. The relative standard deviations of the two standard samples were 6.52% -9.34% respectively. Accuracy and precision can meet the needs of the analysis, with strong practicality.