温度滴定仪快速测定氯化钾中钾含量  

Rapid determination of potassium content in potassium chloride by temperature titrator

作　　者：吴泽培 屈小荣 冯勇 于雪峰 么涵蔚 马占梅 Wu Zepei;Qu Xiaorong;Feng Yong;Yu Xuefeng;Me Hanwei;Ma Zhanmei(Qinghai Salt Lake Industry Co.,Ltd.,Golmud,Qinghai 816000,China;National Engineering Research Centers for Comprehensive Utilization of Salt Lake Resources,Golmud,Qinghai 816000,China;Key Laboratory of Salt Lake Resources Comprehensive Utilization of Qinghai Province,Golmud,Qinghai 816000,China)

机构地区：[1]青海盐湖工业股份有限公司,格尔木816000 [2]国家盐湖资源综合利用工程技术研究中心,格尔木816000 [3]青海盐湖资源综合利用重点实验室,格尔木816000

出　　处：《分析仪器》2019年第6期104-108,共5页Analytical Instrumentation

摘　　要：开发了一种温度滴定仪快速测定氯化钾中钾含量的分析方法,通过四苯硼酸钠与钾离子生成四苯硼酸钾沉淀,是明显的放热化学反应的理论,采用温度滴定法对氯化钾中钾含量进行测定。方法相比传统重量法,无需沉淀、分离、烘干、称量,操作简便、快速、准确。经4个第三方实验室比对,以及与国标方法的对照,该方法的平行性实验和重复性较好,标准偏差均小于2%,适用于指导生产和产品质量把关。The precipitation of potassium tetraphenylborate is produced by sodium tetraphenylborate and potassium ion.The content of potassium in potassium chloride was determined by temperature titration.Compared with the traditional gravimetric method,this method is simple,rapid and accurate without precipitation,separation,drying and weighing.The comparison results of four third-party laboratories and the comparison with the national standard method show that the parallel experiment and the repeatability of this method are better,the standard deviation is less than 2%,this method is suitable for guiding production and controling product quality.

关 键 词：温度滴定仪 快速测定 钾含量 四苯硼酸钠 

分 类 号：O65[理学—分析化学]