双氧水氧化法测定硫化锂含量  

The Main Content of Lithium Sulfide was Determined by Hydrogen Peroxide-oxidation Method

作　　者：杨艳辉 蒋娴芳 陈怡君 廖仕英 杨柳 陈格 YANG Yanhui;JIANG Xianfang;CHEN Yijun;LIAO Shiying;YANG Liu;CHEN Ge(Tianqi Lithium(Shehong)Co.,Ltd.,Suining 629200,Sichuan,China;Sichuan Key Laboratory of Lithium Resources and Materials,Suining 629200,Sichuan,China)

机构地区：[1]天齐锂业(射洪)有限公司,四川遂宁629200 [2]四川省锂资源与锂材料重点实验室,四川遂宁629200

出　　处：《四川化工》2025年第1期19-22,60,共5页Sichuan Chemical Industry

摘　　要：首先使用X射线衍射(XRD)对硫化锂进行定性,再使用双氧水将硫化锂氧化成硫酸锂,然后使用原子吸收分光光度法测定锂含量,重量法测定硫含量,间接得出硫化锂的含量。通过对测锂、硫间接得出的硫化锂含量进行F检验、t检验,这两种方式得出的硫化锂数据精密度及结果均值不存在显著性差异,但重量法测硫酸根过程较长且复杂,故选择通过将硫化锂氧化成硫酸锂后,再测定其锂含量间接得出硫化锂的主含量。结果表明,该方法精密度较好,相对标准偏差小于1.0%,加标回收率为98.87%~100.04%,准确度较高。Firstly,X-Ray Diffraction(XRD)is used to qualitatively analyze lithium sulfide,and then hydrogen peroxide is used to oxidize lithium sulfide into lithium sulfate.Then,atomic absorption spectrophotometry is used to determine the lithium content,and the weight method is used to determine the sulfur content,indirectly obtaining the content of lithium sulfide.By conducting F-test and t-test on the lithium sulfide content indirectly obtained by measuring lithium and sulfur,there was no significant difference in the precision and mean results of the lithium sulfide data obtained by these two methods.However,the process of measuring sulfate ions by weight method is long and complex.Therefore,it was chosen to indirectly obtain the main content of lithium sulfide by oxidizing lithium sulfide to lithium sulfate and then measuring its lithium content.The results showed that the method had good precision,with a relative standard deviation of less than 1.0%,a spiked recovery rate of 98.87%to 100.04%,and high accuracy.Firstly,XRD is used to qualitatively analyze lithium sulfide,and then hydrogen peroxide is used to oxidize lithium sulfide into lithium sulfate.Then,atomic absorption spectrophotometry is used to determine the lithium content,and the weight method is used to determine the sulfur content,indirectly obtaining the content of lithium sulfide.By conducting F-test and t-test on the lithium sulfide content indirectly obtained by measuring lithium and sulfur,there was no significant difference in the precision and mean results of the lithium sulfide data obtained by these two methods.However,the process of measuring sulfate ions by weight method is long and complex.Therefore,it was chosen to indirectly obtain the main content of lithium sulfide by oxidizing lithium sulfide to lithium sulfate and then measuring its lithium content.The results showed that the method had good precision,with a relative standard deviation of less than 1.0%,a spiked recovery rate of 98.87%to 100.04%,and high accuracy.

关 键 词：硫化锂 含量测定 双氧水 原子吸收分光光度法 重量法 

分 类 号：TQ131.11[化学工程—无机化工] O657.31[理学—分析化学]