期刊文献+

乙基罗丹明B和高碘酸钾反应动力学测定痕量铑 被引量:13

Kinetic Determination of Trace Rhodium Based on the Reaction of Ethylrhodamine B with Potassium Periodate
下载PDF
导出
摘要 研究了一个动力学测定铑的方法。在氯化钠-磷酸溶液和加热下铑催化乙基罗丹明B褪色,lg(A0/A)与铑浓度呈线性的范围是0.2~4.0μg/25mL,检出限为2.24×10-10g/mL,对2.0μg铑标准溶液测定11次的相对标准偏差为2.13%。Os、Ru、Ir对测定有干扰,其他贵金属、有色金属和铁不干扰。本反应对乙基罗丹明B或铑(Ⅲ)为一级,催化反应的表观活化能为65.21kJ/mol。本法已用于某些催化剂和贵金属溶液样品中痕量铑的测定,回收率为95.6%~102.6%,相对标准偏差为1.48%~2.95%。 A kinetic method for the determination of rhodium was developed.Rhodium was determined by its catalytic effect on the oxidation of ethylrhodamine B by potassium periodate on heating in sodium chloride and phosphoric acid solution with the result of decoloration.The linear relation between log ( A 0/A ) and concentration of Rh(Ⅲ) was found in the range of 0.2~4.0μg/25mL, and the limit of determination was 2.24×10 -10 g/mL.The relative standard deviation obtained from 11 standard solutions containing 2μg/25mL rhodium was 2.13% .Os,Ru and Ir interfere with the spectrophotometric determination,other platinum group metals,nonferrous and iron do not interfere.The reaction is first order in ethylrhodamine B or rhodium,and the apparent activation energy of catalytic reaction was found to be 65.21kJ/mol.The method has been used to determine trace rhodium in some catalyst samples with the recovery of 95.6-102.6%,and relative standard deviations of 1.48~2 95%.
出处 《分析试验室》 CAS CSCD 1999年第2期11-14,共4页 Chinese Journal of Analysis Laboratory
关键词 乙基罗丹明B 催化光度法 动力学 测定 Rhodium ethylrhodamine B,Catalytic spectrophotometry kinetic analysis
  • 相关文献

参考文献9

二级参考文献18

共引文献98

同被引文献468

引证文献13

二级引证文献80

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部