COD法快速检测氟化锂中残留EDTA含量  

Rapid determination of residual EDTA content in lithium fluoride via COD method

作　　者：宋崇虎 朱咏梅[1] 徐国栋 程泽英 SONG Chonghu;ZHU Yongmei;XU Guodong;CHENG Zeying(Analysis and Testing Center,Jiangxi Normal University,99 Ziyang Avenue,Nanchang 330022,China;Jiangxi Yishan Environmental Protection Co.,Ltd.,No.366,Longxiang 1st Road,Nanchang High-tech Industrial Development Zone,Nanchang 330096)

机构地区：[1]江西师范大学分析测试中心,江西南昌330022 [2]江西怡杉环保股份有限公司,江西南昌330096

出　　处：《江西化工》2022年第2期54-56,共3页Jiangxi Chemical Industry

摘　　要：在生产氟化锂的过程中通常需要控制Ca^(2+)的含量。为了减少Ca^(2+)的含量,通常会在制备过程中加入EDTA的钠盐,但是EDTA的含量过高又会影响电解质的品质。因此,简单快速的测定EDTA的方法显得尤为重要。本文提供了一种测定LiF中残留EDTA的COD法,通过对LiF中EDTA的监控与分析来考察生产LiF的工艺中残留Ca^(2+)的含量,使用该方法测得的标准曲线的标准方差R^(2)=0.991。该法快速、简单、准确,为氟化锂产品中EDTA残留量分析提供可靠依据。In the process of producing lithium fluoride,it is usually necessary to control the content of Ca^(2+) ions.In order to reduce the content of Ca^(2+) ions,sodium salt of EDTA is usually added to control the content of Ca ions.However,the high content of EDTA will affect the quality of electrolyte.Therefore,a simple and rapid method for the determination of EDTA is particularly important.This paper provides a COD method for the determination of residual EDTA in LIF.By monitoring and analyzing EDTA in LIF,the content of residual Ca ions in the production process of LIF is investigated.The standard variance of the standard curve measured by this method is R^(2)=0.991.The method is rapid,simple and accurate,and provides a reliable basis for the determination of EDTA residues in lithium fluoride products.

关 键 词：COD法 氟化锂 残留EDTA 

分 类 号：TQ131.11[化学工程—无机化工]