摘要
本文对在弱酸性介质中铬(Ⅵ)强烈催化H_2O_2氧化铬蓝黑R褪色反应进行了一系列研究,拟定了用催化动力学法测定铬(Ⅵ)的最佳条件。该法检出限为3.2×10 ̄_(-9)mL,测定线性范围0~1.5μg/25mL铬(Ⅵ),用于化探样品中痕量铬的测定,结果良好。
Chromium can catalyze the decolorization oxida-tion of chrome blue-black R by H_2O_2 in weak acidmedium.The conditions of kinetics have been studiedin detail and the optimum conditions of catalytic kinet-ic determination of chromium were established. Thedetection limit of chromium in this method is 3.2×10 ̄(-9)g/mL and the linear response is in the range of 0~1. 5μg/25mL chromium. Satisfactory results wereobtained for the determination of trace chromium ingeochemistry samples.
出处
《分析试验室》
CAS
CSCD
北大核心
1994年第2期48-49,共2页
Chinese Journal of Analysis Laboratory
关键词
催化动力学
铬
化探样品
Catalysis
kinetics
chromium deter-mination