四苯硼钠—季铵盐质量滴定法分析常量铷

Determination of Rubidium in High Concentrations by the Mass Titration with Sodium Tetraphenylboron-Quaternary Ammonium Salt

中文关键词:  铷  四苯硼钠  季铵盐  松节油  质量滴定

英文关键词:Rubidium  Sodium tetraphenylboron  Quaternary ammonium salt  Turpentine  Mass titration

中文摘要:

      采用四苯硼钠—季铵盐质量滴定法分析溶液中的常量铷,考察了松节油用量和共存离子(Ca²⁺、Mg²⁺、Li⁺、CO2-₃、SO2-₄、B₄O2-₇)对氯化铷溶液中Rb⁺分析结果的影响。溶液中Rb⁺浓度为0.05%～0.15%时,分析结果的相对误差＜0.3%,加标回收率为99.20%~101.2%。溶液中的共存离子Ca²⁺、Li⁺和SO2-₄对Rb⁺分析无影响。

英文摘要:

      :The rubidium in high concentrations was analyzed by the mass titration sodium tetraphenylboron-quaternary ammonium salt.The effects of turpentine drop number and coexisting ions including Ca²⁺,Mg²⁺,Li⁺,CO2-₃,SO2-₄and B₄O2-₇ on the determination of rubidium were studied respectively.When the concentrations of Rb⁺ were from 0.05% to 0.15% in weight,the relative error by this method was less than 0.3%,and the samples recoveries were from 99.16% to 101.52%.Coexisting ions,such as Ca²⁺,Li⁺,and SO2-₄ have little impact on the analysis of rubidium using this method.