电位滴定法测双草酸硼酸锂中游离酸的方法探索  

The potentiometric method titration for measuring the trace amount of free acid in lithium bis(oxalate)borate

作　　者：廖红伟 Liao Hongwei(Dongguan Shanshan battery material Co. , Ltd. , Dongguan 523058,Chin)

机构地区：[1]东莞市杉杉电池材料有限公司,东莞523058

出　　处：《分析仪器》2018年第2期120-125,共6页Analytical Instrumentation

摘　　要：建立了电位滴定法测双草酸硼酸锂中游离酸的检测方法,该方法以四丁基氢氧化铵的碳酸丙烯酯溶液为滴定标准溶液,在碳酸丙烯酯溶剂中,以复合玻璃电极为测量电极,采用非水酸碱电位滴定法测试双草酸硼酸锂中游离酸的含量。该方法解决了目前无法检测双草酸硼酸锂中游离酸的问题。测试结果表明:方法检出限在10μg/g以下,相对标准偏差<5.1%,回收率为92~103%。This method takes the tetrabutylammonium hydroxide in propylene carbonate as standard solution for titration,and a composite glass electrode as the measuring electrode in the propylene carbonate solvent.The nonaqueous acid-base potentiometric titration method is used to test the free acid content in double oxalic acid boric lithium.This method solves a problem that the free acid in lithium borate can not be detected by traditional method.The results show that the limit of detection of the method is less than 10 ug/g with relative standard deviation below 5.1% and its recovery rate is 92%-103%.

关 键 词：非水酸碱滴定法 双草酸硼酸锂 检测方法 四丁基氢氧化铵 

分 类 号：O657.1[理学—分析化学] TM912[理学—化学]