摘要
本文研究了氨性介质中,钴(Ⅱ)催化过氧化氢氧化茜素红的褪色反应及其动力学条件,建立了分光光度法直接测定超痕量钴(Ⅱ)的新方法,其Sandell灵敏度为6.21×10^(-6)μg/cm^2,测定钴(Ⅱ)的范围为0～0.1μg/25mL,方法简便、快速、分析费用低,可用于人发和血液中痕量钴(Ⅱ)的测定。
Ultra-trace Co(Ⅱ) in aqueous ammonia can catalyze the discolouring oxidization of alizarin red by hydrogen peroxide. In the paper its kinetic condition is offered. A new method to determine ultratrace Co(Ⅱ) directly by spectrophotometry is reported. The Sandell sensitivity of the method is 6.21 ×10^(-6)μg/cm^2 and the range of determination is 0 to 0.1μg/25mL of Co(Ⅱ). This method is characterized by its simplicity, rapidity and low expense and may be used to determine ultratrace Co(Ⅱ) in human hairs and blood.
出处
《分析试验室》
CAS
CSCD
北大核心
1991年第5期8-10,共3页
Chinese Journal of Analysis Laboratory
关键词
催化光度法
钴
茜素红
测定
Cobalt determination
Catalytic kinetic spectrophotometry
