化学光谱法测定金属锂中6种微量杂质的研究

Determination of Six Trace Elements in Metal Lithyium by Chemi-Spectrometry

应用阴离子交换树脂分离锂与待测元素,电感耦合等离子体原子发射光谱法测定金属锂中钙、钴、铁、钼、锡和锌6种微量元素。考察了锂的基体效应,锂与待测元素的分离条件,酸浓度的影响,选择了载气流量和元素的分析线。取样量为1g时,元素的测定范围为20—640μg/g,方法回收率在93.0%—108%之间,相对标准偏差(RSD,n=6)在4.6%—7.2%之间。

The six trace elements Ca,Co,Fe,Mo,Sn and Zn in metal lithium were determined by inductively coupled plasma atomic emission specrometry. The experimental conditions such as analytical lines, flow rate of carrier gas, concentration of nitric acid and the influence of matrix of lithium were investigated. The ranges of determination was 20-640μg/g with the sampling of lg. The recoveries were between 93% and 108%,the relative standard deviationes were between 4.6%and 7.2%.