氟化钠纯度测定方法探讨与比较  

Discussion and Comparison of Determination Methods for Sodium Fluoride Content

作　　者：王秀莉[1] 宋丹丹[1] 尚玉俊[1] 张金玉 WANG Xiu-li;SONG Dan-dan;SHANG Yu-jun;ZHANG Jin-yu(High and New Technology Research Center of Henan Academy of Sciences,Henan Zhengzhou 450002,China)

机构地区：[1]河南省科学院高新技术研究中心,河南郑州450002

出　　处：《广州化工》2022年第9期89-92,124,共5页GuangZhou Chemical Industry

基　　金：河南省重点研发与推广专项(科技攻关)项目(No.212102310080);中央公益性科研院所河南省科学院基本科研费(追加)项目(No.200602071);郑州市基础研究及应用基础研究专项项目(No.gy21002)。

摘　　要：通过对氟化钠纯度各测定方法进行探讨,包括国家标准方法氟氯化铅沉淀滴定法(LCF),硅胶反应法(SGR),离子交换法(IEM)和蒸馏-硝酸钍滴定法(DTN),以及硝酸镧-EDTA滴定法(LNE)和氟离子选择电极法,指出各方法的优缺点、操作要点、误差来源及存在的问题等。经过比较,氟离子选择电极自动电位滴定法(FAP)具有操作简便,准确度高,选择性好,适用范围广,干扰因素少的特点,可作为日常氟化钠纯度检测的实验方法使用。The national standard methods of sodium fluoride content determination including lead chloride fluoride precipitation titration(LCF),silica gel reaction method(SGR),ion exchange method(IEM),distillation-thorium nitrate titration(DTN),and other determination methods including lanthanum nitrate-EDTA titration(LNE),fluoride ion selective electrode method were discussed.The advantages and disadvantages,key points,error sources and existing problems were pointed out.The comparison of determination methods shows that FAP was a reliable experimental method for daily detection of sodium fluoride content because of simple operation,high efficiency,excellent selectivity,wide application range,and less interference factors.

关 键 词：氟化钠 硝酸镧 氟离子选择电极 自动电位滴定法 EDTA 硝酸钍 

分 类 号：TQ115[化学工程—无机化工]