钌催化高碘酸盐氧化亚甲蓝的反应特性及应用  

Catalysis of Ruthenium in the Oxidation Reaction of Methylene Blue with Periodate and Its Analytical Application

作　　者：曹秋娥[1] 李祖碧[2] 王加林[2] 徐其亨[1] 

机构地区：[1]云南大学化学系,昆明650091 [2]云南大学成人教育学院,昆明650091

出　　处：《分析化学》2001年第6期649-652,共4页Chinese Journal of Analytical Chemistry

摘　　要：报道在９０±０．５℃和硫酸介质中，Ｒｕ（Ⅲ）催化高碘酸盐氧化亚甲蓝（ＭＢ）的反应，实现了钉的动力学光度法测定，研究了反应的适宜条件及动力学参数，并探讨了反应机理。方法的线性范围为０．０－１．２和１．２－５．６μｇ／Ｌ，检出限为０．００５μｇ／Ｌ。共存离子浓度高于Ｒｕ（Ⅲ）浓度５０倍不干扰测定。本法灵敏度高、选择性好、稳定，已满意地用于岩矿及冶金产品中钉的测定，其ＲＳＤ为１．３％－２．２％，标准加入回收率为 ９９％－１０５％。The catalytic effect of ruthenium on the oxidation reaction of methylene blue (MB) was investigated and applied for the determination of ruthenium(Ⅲ) by the kinetic spectrophotometry in the sulfuric acid medium at 90 ± 0.5℃. The optimum reaction conditions, kinetic parameters and reaction mechanism were studied. The linear ranges for the determination of ruthenium(Ⅲ). were 0.0 - 1. 2 and 1 .2 - 5. 6 μg/L with a detection limit of 0.05 μg/L. Almost no foreign ions more than 50-fold concentration of Ru(Ⅲ) interfered with the determination. The method, which was of high sensitivity, good selectivity and stability, was successfully applied for the determination of trace ruthenium in some ores and metallurgical products, the RSD (n=8)was 1.3%-2.2% and the recovery was between 99% and 105%.

关 键 词：催化光度法 钌 亚甲蓝 高碘酸钾 测定 氧化 动力学光度法 

分 类 号：O657.3[理学—分析化学]