摘要
在H3PO4 介质中,Ru( Ⅲ) 对KIO4 氧化二安替比林间溴苯基甲烷( DAm BM) 的显色反应有明显的催化作用。基于此,建立了测定痕量钌的催化分光光度分析法,并且测定了一些动力学参数。方法的检出限为2 .3 μg/ L,钌的质量浓度在0 ~12 μg/ L 符合比尔定律。方法已应用于矿样中痕量钌的测定,5 次测定的RSD< 5 % ,加标回收率在96 % ~101 % 。
A kinetic spectrophotometric method for the determination of ruthenium (Ⅲ) based on the catalytic effect of Ru on the oxidative color reaction of diantipyryl ( m bromo) phenylmethane with potassium periodate in phosphoric acid medium has been developed. The detection limit is 2.3 μg/L for Ru (Ⅲ)and Beers law is obeyed in the concentration range of 0~12 μg/L. Some kinetic parameters were also studied. The method has been applied to the determination of ruthenium in ores. The recoveries are 96%~101% for Ru(Ⅲ) with precision of <5% RSD( n =5).
出处
《岩矿测试》
CAS
CSCD
北大核心
1999年第4期288-290,共3页
Rock and Mineral Analysis
关键词
钌
二安替比林
间溴苯基甲烷
高碘酸钾
比色法
ruthenium
diantipyryl ( m bromo) phenylmethane
potassium periodate
catalytic kinetic spectrophotometry