四苯硼钠—季铵盐—双指示剂容量法快速测钾  

Rapid Determination of Potassium Content by Sodium Tetraphenylboron-Quaternary Ammonium Salt-Double Indicator Volume Titration

作　　者：郭菊花[1] 陈华丹 林雅梅[1] 陈佳伟[1] 兰加健 童跃进[1] GUO Ju - hua CHEN Hua - dan LIN Ya - mei CHEN Jia - wei LAN Jia - jian TONG Yue - jin(College of Chemistry and Chemical Engineering, Fujian Normal University, Fuzhou 350007, Chin)

机构地区：[1]福建师范大学化学与化工学院,福建福州350007

出　　处：《盐业与化工》2016年第12期30-33,共4页Jounral of Salt and Chemical Industry

基　　金：国家自然青年科学基金项目(NSFC21406035);福建省科技厅高校产学研重大项目(2013H6006);福建省教育厅资助项目(JA14076);福建师范大学校级大学生创新创业训练计划(cxxl-2016105)

摘　　要：为了快速测定各类含钾产品生产过程尤其是海水提钾工艺过程中的钾含量,建立了一种四苯硼钠—季铵盐—双指示剂容量法。该方法成本低、步骤少、耗时短、滴定终点敏锐,当待测试样中钾含量为4 mg^8 mg时,测量的相对误差小于1%,变异系数小于2%,满足常量滴定分析的要求。针对类似海水的复杂溶液体系,该方法远远优于四苯硼钾重量法。In order to determine the potassium content rapidly in potassium-bearing product manufacturing process,especially potassium extraction from seawater,the Sodium Tetraphenylboron-Quaternary Ammonium Salt-Double Indicator volume titration method was established. The cost of the method is low,the procedure is simple,the time of consumption is short and the titration end-point is sharp. In the potassium content range of 4 mg ~ 8 mg,the relative error and the coefficient of variation was less than 1% and 2%,which meets the requirement of macroanalytic experiment. This method is far better than potassium tetraphenylborate gravimetric method for multicomponent solution especially sea water.

关 键 词：四苯硼钠 季铵盐 双指示剂 容量法 钾含量 

分 类 号：O655.1[理学—分析化学]