摘要
基于在稀硫酸介质中,抗坏血酸存在下,钒对溴酸钾氧化藏花红O的催化褪色作用,本文建立了一种测定痕量钒的简单、灵敏的分析方法-催化比色法。该法线性范围为0.005～10μg/25ml,灵敏度为8×10^(-12)g/ml,与离子交换分离技术相结合,该法已应用于水体及人发中痕量钒的测定。本文还就反应机理进行了探讨。
A simple and sensitive catalytic colorimetry has been developed for determination of trace vanadium. It is based on the catalysis of V (V) to decoloration of safranine O oxidized with potassium bromate in diluted sulfuric acid medium in the presence of ascorbic acid. The linear range of determination is 0.005—10μg/25ml V(V). The sensitivity is 8×10^(-12) g/ml. Combining with separation of ionic exchange, the method has been applied to the determination of trace vanadium in natural water and human hair. The mechanism of reaction is investigated, too.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1989年第7期622-624,共3页
Chinese Journal of Analytical Chemistry
关键词
钒
催化比色法
藏花红0
比色法
Kinetic analysis
Catalytic colorimetry
Vanadium
