四苯硼钠—季铵盐质量滴定法分析钾含量研究  

Mass Titration to Analyze Potassium Content by Sodium Tetraphenylboron and Hexadecyl Trimethyl Ammonium Bromide

作　　者：王涛[1,2] 钟远 李海军[1] 孙柏[1] 宋彭生[1] 

机构地区：[1]中国科学院青海盐湖研究所,青海西宁810008 [2]中国科学院大学,北京100049

出　　处：《盐湖研究》2013年第3期30-35,共6页Journal of Salt Lake Research

基　　金：国家自然科学基金项目(20773152);青海省科技创新能力促进计划项目(2009-Z-725)资助

摘　　要：依据四苯硼钠—季铵盐容量法滴定K+离子的原理,采用质量滴定法,考察了滴定速度、松节油加入量对四苯硼钠与季铵盐反应的影响及共存离子(包括Li+、Mg2+、Ca2+、SO42-、B4O72-、CO32-)对K+含量测定结果的影响。当测定K+离子含量在5～15 mg范围内,松节油最佳加入量为25滴,分析误差<0.3%。According to the principle of sodium tetraphenylborate-ammonium ions volumetry, the effects of the titration speed, the terebinthine quantity addition and the coexist ions including Li ＋ , Mg2 ＋ , Ca2＋ , SO24- , B4O27- , and CO23- were studied by mass titration method. The experiment results confirmed that when the content of potassium is between 5 mg and 15 mg, the best addition of turpentine oil is 25 drops and the analytical error is less than 0.3 %.

关 键 词：钾离子 质量滴定法 松节油 共存离子 

分 类 号：O655.1[理学—分析化学]