【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。更多还原

【Abstract】 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+,CO2-3,SO2-4and B4O2-7on 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 SO2-4have little impact on the analysis of rubidium using this method.更多还原