Catalysis of Ruthenium in the Oxidation Reaction of Methylene Blue with Periodate and Its Analytical Application
- VernacularTitle:钌催化高碘酸盐氧化亚甲蓝的反应特性及应用
- Author:
Qiue CAO
;
Qiheng XU
;
Zubi LI
;
Jialin WANG
- Publication Type:Journal Article
- From:
Chinese Journal of Analytical Chemistry
2001;29(6):649-652
- CountryChina
- Language:Chinese
-
Abstract:
The catalytic effect of ruthenium on the oxidation reacti on 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 r eaction mechan ism 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) I nterfered with the determination. The method, which was of high sensitivity, good selectivity and stability, was s uccessfully applied for the determination of trace ruthenium in some ores and m e tallurgical products, the RSD (n=8) was 1.3%～2．2％ and the recovery was between 99% and 105%.
