高灵敏铑(Ⅲ)-SnCl_2-罗丹明6G水相显色体系的研究  

A new highly sensitive spectrophotometric method using Rh(Ⅲ)-SnCl_2-rhodamine 6Ggelatin system for the determination of rhodium

作　　者：李玲颖[1] 安晏[1] 

机构地区：[1]南开大学化学系

出　　处：《化学试剂》1990年第5期274-276,共3页Chemical Reagents

摘　　要：建立了在 SnCl_2和明胶存在下,用罗丹明6G 光度测定微量 Rh(Ⅲ)的新方法。■52×10~5,是水相分光光度测定 Rh 的灵敏度最高的方法之一。显色溶液可稳定4.5小时。选择性很好。测定了纯 Pd 中的微量 Rh,结果良好。还适于其它纯贵金属或合金中微量 Rh 的分析。A new spectrophotometric method has beenproposed for the determination of trace Rh(Ⅲ)in aqueous solution by rhodamine 6 G in the pre-sence of SnCl_2 and gelatin.It has the advantagesof high sensitivity,stability,selectivity and noharm to the operators.The calibration curve islinear over the range 0～12 μg/25cm^3 The apparant molar absorptivity of Rh(Ⅲ)at 558 nm is1.52×10~5l·mol^(-1)·cm^(-1) which is one of the great-est up to now when Rh(Ⅲ)is determined inaqueous solution The ion associated compoundobtained is found to be[Rh_2Cl_2(SnCl_3^-)_4]^(4-)·(R6G^+)_4.Most of the base metals and noble metalsdo not interfere

关 键 词：铑 SnCl2 罗丹明6G 水相显色体系 

分 类 号：O614.822[理学—无机化学]