阴离子树脂预处理-离子色谱法测定核纯氢氧化锂中阴离子杂质  

Determination of Anion Impurities in Nuclear Grade Lithium Hydroxide by Ion Chromatography After NH_2-R Resin Pretreatment

作　　者：李伯平[1] 王志龙[1] 徐静[1] 崔建勇[1] 郭冬发[1] LI Boping;WANG Zhilong;XU Jing;CUI Jianyong;GUO Dongfa(Beijing Research Institute of Uranium Geology,Beijing 100029,China)

机构地区：[1]核工业北京地质研究院,北京100029

出　　处：《铀矿地质》2019年第1期33-37,64,共6页Uranium Geology

摘　　要：采用氨型弱阴离子交换树脂预先对核纯氢氧化锂溶液转型,消除核纯氢氧化锂溶液中的游离氢氧根基体,转型后的溶液采用阴离子色谱法同时测定杂质氟离子、氯离子和硫酸根离子。该方法获得的氟离子、氯离子和硫酸根离子加标回收率优于90%,对应检出限分别为:5.0μg/g、 11.0μg/g和24.0μg/g。A new method for the determination of F^-,Cl^-and SO4^2-in nuclear grade lithium hydroxide was developed.Lithium hydroxide solution was first treated by acidified NH2-R resin to form a natural solution,then the anion impurities of F^-,Cl^-and SO4^2-were detected by ion chromatography.The recovery of F^-,Cl^-and SO4^2-were higher than 90%by standard addition,and the LOD of F^-,Cl^-and SO4^2-were 5.0μg/g,11.0μg/g and 24.0μg/g,respectively.

关 键 词：核纯氢氧化锂 基体消除 离子色谱 杂质阴离子 

分 类 号：O657.75[理学—分析化学]