摘要
在硫酸介质中,钌(Ⅲ)对高碘酸钾氧化甲基绿褪色反应具有显著的阻抑作用,从而提出了一种阻抑动力学光度法测定痕量钌(Ⅲ)的方法。优化的试验条件如下:①0.01mol.L-1高碘酸钾溶液用量为1.40mL;②1×10-3 mol.L-1甲基绿溶液用量1.50mL;③反应温度为80℃;④反应时间为10min。钌(Ⅲ)的质量浓度在0.04~64μg.L-1范围内与ΔA呈线性关系,检出限(3s/k)为8.5ng.L-1。方法用于活性炭和分子筛中痕量钌(Ⅲ)的测定,测定值的相对标准偏差在1.6%~2.2%之间,加标回收率在98.6%~100%之间。
It was found that in H2SO4 medium, the oxidation of neutral red by hydrogen peroxide was strongly inhibited by the presence of Ru( Ⅲ ). Based on this fact, the determination of traces of Ru( Ⅲ) by inhibitory kinetic photometry was proposed. The optimized conditions found were as follows: ① amount of 0. 01 mol·L^-1 KIO4 solution: 1.40mL; ② amount of 1×10^-3 mol·L^-1 methyl green solution: 1. 50 mL;③ temperature of reaction: 80;④ time of reaction: 10 rain. Linear relationship between values of AA and mass concentration of Ru(Ⅲ) was obtained in the range of 0. 04-64μg·L-1. Detection limit (3s/k) of the method found was 8. 5 ng·L-1. The proposed method was applied to the determination of Ru( Ⅲ ) in samples of active carbon and molecular sieve. Recovery was tested by addition of standard solution to samples, giving values of RSD's (n=6) and recovery ranged from 1.6%--2. 2 % and 98.6%--100% respectively.
出处
《理化检验(化学分册)》
CAS
CSCD
北大核心
2013年第4期461-463,467,共4页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
基金
四川省教育厅重点项目(10ZA060)
四川省科技厅基础研究(2012JY0045)
绵阳市科技局重点基金(10Y002-4)
关键词
阻抑动力学光度法
高碘酸钾
甲基绿
钌(Ⅲ)
Inhibitory kinetic spectrophotometry
Potassium periodate
Methyl green
Ruthenium(m)
作者简介
魏成富(1956-),男,四川宜宾人,硕士,教授,主要研究方向为高性能结构材料。
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