摘要
本文介绍了用新显色剂二溴羧基偶氮胂分光光度法测定钨合金中的钍.在0.5mol/L硫酸介质中,钍与新试剂形成蓝紫色配合物,在630nm处具有最大吸收,摩尔吸光系数为1.15×10~5L·mol^(-1)·cm^(-1),配合物的组成为Th:R=1:2.钍量在0～50μg/25ml范围内符合比尔定律.许多常见离子在xmg乃至xxmg时不干扰测定.对钨合金中钍的测定获得了满意结果.
A spactrophotometric methad lor determination of thorium in tungsten-base alloy w th the new chromogenic reagent-dibromocarboxyarseaazo is described. In 0.5mol/L H2SO4 medium, thorium, forms -with reagent a blue complex with a maximum absorption at 640am, its molar absorptivity being 1.15x105.The composition of the Th-reagent complex is found to be 1:2. Beer's law is obeyed for 0-Sug of Th in 25al of solution. Most of the metal ions do not interfere with the determination of thorium. The method has been used tu determine thorium in tungsten-base alloy with satisfactory results.
出处
《冶金分析》
CAS
CSCD
北大核心
1993年第6期9-11,共3页
Metallurgical Analysis
关键词
分光光度法
钍
钨合金
测定
Dibromocarboxyarsenazo, Spectrophotometry, Thorium, Tungsten-base alloy
