摘要
本文发现以钡(Ⅱ)作催化剂,能催化加速过硫酸铵氧化甲基蓝的褪色反应,据此建立了测定钡(Ⅱ)的催化动力学光度法。可测定2×10^(-5)～8×10^(-5)g/mL的钡(Ⅱ),检测限为3.69×10^(-6)g/mL。
A new method is studied in this paper for the determination of trace Ba（ Ⅱ ）. It is founded that Ba（Ⅱ ） may catalyze the discoloring oxidation reaction of methyl blue by （NH4）2S2O8.A new catalytic method for the determination of trace Ba（Ⅱ） was thus developed. The linear range of 2×10^-5-8 × 10^-5g/mL was obtained for Ba （ Ⅱ ）.The sensitivity of the method was 3.69 × 10^-6g/mL.
关键词
催化褪色反应
分光光度法
钡
甲基蓝
Catalytic discoloration reaction
Spectrophotometry
Ba（Ⅱ）
Methyl blue
