摘要
本文研究了二溴羧基偶氮胂与Cr_2O_7^(2-)在硝酸介质中的褪色反应,实验结果表明,利用此褪色反应测定铬(Ⅵ),其灵敏度高,表观摩尔吸光系数达1.4×10~5,线性范围为0～4μg/25mL,应用于合金钢及废水中微量铬的测定,获得了满意结果。
The optimum conditions for determining trace Cr by the fading reaction of dibromocarboxyarsenazo with Cr_2O(?)^(2-) were worked out in the medium of nitric acid. The results show that the determination of Cr (Ⅵ) by this fading reaction has high sensitivity. The molar absorptivity is 1.4×10~5L·mol^(-1)·cm^(-1),and the linear range is 0～4μg/25mL Cr. Good results were obtained for determinning trace Cr in alloy steels and waste water.
出处
《分析试验室》
CAS
CSCD
北大核心
1993年第2期43-44,共2页
Chinese Journal of Analysis Laboratory
关键词
褪色光度法
偶氮胂
铬
合金钢
Fading spectrophotometry
dibromocarboxyarsenazo
Cr (Ⅵ) determination
