用氯化银比浊—紫外-可见分光光度法测定粗碳酸锂中的氯离子  

Determination of Cl-in Crude Lithium Carbonate by Silver Chloride Turbidimetry—Ultraviolet-Visible Spectrophotometry

作　　者：黎佳伟 谢堂锋 张莹娇 阮丁山 LI Jiawei;XIE Tangfeng;ZHANG Yingjiao;RUAN Dingshan(Hunan Brunp Recycling Technology Co.,Ltd.,Changsha 410600,China;Guangdong Provincial Key Laboratory of Battery Recycling and Reuse,Foshan 528137,China;Guangdong Brunp Recycling Technology Co.,Ltd.,Foshan 528137,China)

机构地区：[1]湖南邦普循环科技有限公司,湖南长沙410600 [2]广东省电池循环利用企业重点实验室,广东佛山528137 [3]广东邦普循环科技有限公司,广东佛山528137

出　　处：《湿法冶金》2022年第2期176-180,共5页Hydrometallurgy of China

基　　金：国家重点研发计划项目(2018YFC1901803);广东省电池循环利用企业重点实验室(2021年度)项目(2021B1212050002)。

摘　　要：建立了氯化银比浊-紫外分光光度法测定粗碳酸锂中的Cl-含量。用硝酸和双氧水溶解试样,用紫外分光光度法测定吸光度,根据标准工作曲线确定Cl-含量。结果表明:工作曲线方程为y=0.0489 x+0.0042,相关系数为0.9998,线性相关性较好,相对标准偏差小于3%,回收率为98.5%~101.25%。方法的准确度和精密度较高,适合用于测定粗碳酸锂中较低含量的氯离子。A method for determination of chloride concentration in crude lithium carbonate by sliver chloride turbidimetry-ultraviolet-visible spectrophotometry was established.The specimen was dissolved using nitic acid and hydrogen peroxide.The absorbance was measured by spectrophoto-metry,and chloride ion concentration was determined according to standard working curve.The results show that the linear equation with great linear relationship is y=0.0489 x+0.0042,and the correlation coefficient is 0.9998.The relation standard deviations is less than 3%,and the recoveries are between 98.5%~101.25%.This method is accuracy and precision well,which is suitable for detection of chloride ion in crude lithium carbonate.

关 键 词：比浊 紫外-分光光度 粗碳酸锂 氯离子 测定 

分 类 号：O657.3[理学—分析化学]