摘要
本文研究了苦胺酸偶氮变色酸与钴的反应条件,在氨性介质中试剂与钴形成1:1的蓝色配合物,在645nm波长处具有最大吸收,对比度为85nm,摩尔吸光系数为2.95×10~4,钴量在0～20μg/25ml范围内符合比尔定律.反应有很高的选择性,大量的镍不影响测定.试剂用于钢铁中微量的钴的测定,获得满意的结果.
In ammoniacal medium, cobalt reacts with picramazochrom to form a 1 : 1 blue complex, having an absorption maximum at 64Snm. Under the conditions employed, the molar absorptivity was found to be 2.95x104 at 64Snm and Beer's law is obeyed for 5-20ug/25ml Most of metal ions do not interfere with the determination of cobalt. The method was applied to the determination of cobalt in steels with satisfactory results.
出处
《冶金分析》
CAS
CSCD
北大核心
1991年第1期11-14,共4页
Metallurgical Analysis
