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.
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)
出处
《四川化工》
2025年第1期19-22,60,共5页
Sichuan Chemical Industry
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
lithium sulfide
content determination
hydrogen peroxide solution
atomic absorption spectrophotometry
weight method
作者简介
通信作者:杨艳辉,本科、分析检测工程师,主要从事分析方法的改进与开发相关工作,邮箱:yangyh@tianqilithium.com。
