复混(合)肥料中钾含量测定方法的探讨  

Determination Method for Potassium Content in Compound Fertilizers

作　　者：王蓉 胡春 张静 Wang Rong;Hu Chun;Zhang Jing(Ningxia Institute of Quality Standards and Testing Technology for Agricultural Products,Yinchuan,Ningxia 750002)

机构地区：[1]宁夏农产品质量标准与检测技术研究所,宁夏银川750002

出　　处：《宁夏农林科技》2020年第11期52-54,共3页Journal of Ningxia Agriculture and Forestry Science and Technology

摘　　要：目前测定复混(合)肥料中钾的方法为国标法——四苯硼酸钾重量法,本实验改进优化了该方法的沉淀过程,主要是将标准中进行沉淀测定的4号玻璃坩埚优化为12.5 cm的定量滤纸进行研究。经过方法的准确度、精密度、相差试验,结果显示:改进优化后的沉淀方法具有较高的准确度和精密度,且操作更加方便、简单、快捷,适用于复混肥料中钾含量的测定。At present,potassium tetraphenylborate gravimetric method is used to determine potassium in compound fertilizer,and precipitation process of the method is improved and optimized by this experiment.The precipitation process of this method is mainly carried out by optimizing the No.4 glass crucible for precipitation determination in the standard and the quantitative filter paper of 12.5 cm.The results show that the improved precipitation method has higher accuracy and precision,and the operation was more convenient,simpler and faster,which is suitable for the determination of potassium content in compound fertilizer.

关 键 词：四苯硼酸钾重量法 钾 标准 坩埚 滤纸 优化 

分 类 号：TQ444[化学工程—化学肥料工业]