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＋、CO2-3、SO2-4、B4O2-7）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SO2-4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＋ , CO3-, SO42- and B4O72- on the determination of rubidium were studied respectively. When the concentrations of Rb＋ were from O. 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 SO42- have little impact on the analysis of rubidium using this method.