电感耦合等离子发射光谱法测定锂制品中的Cu、Pb、Zn、Ni、Ca、Mg、Mn、Cd

Inductively coupled plasma emission spectrometry determination of Cu， Pb， Zn， Ni， Ca， Mg， Mn and Cd contents in lithium products

摘要: 本实验采用电感耦合等离子发射光谱法来测定锂制品中的Cu、Pb、Zn、Ni、Ca、Mg、Mn、Cd等杂质元素量，确定了用硝酸（1+1）10 mL分解样品以及选择锂浓度为5 mg/mL基体效应最小；选择了适合本实验分析用的波长（Zn：213.856 nm；Ca：396.847 nm；Cd：228.802 nm；Cu：324.754 nm；Mg：280.270 nm；Mn：259.373 nm；Ni：231.604 nm；Pb：220.353 nm）；仪器功率选择1000W；通过实验得出标加回收率为92%-110%，相对标准偏差小于5%；并确定测定范围为Mn、Cd、Ni 、Zn 0.00005 %～0.0080 %，Ca、Cu、Mg 0.0001 %～0.0080 %，Pb 0.0002 %～0.0080 %。

Abstract: The inductively coupled plasma emission spectrometry is adopted to determine the amount of common impurity elements in the lithium products. Many influence factors, such as the sample decomposition and the influence of matrix effect on determination, selection of suitable analytical spectral lines(Zn:213.856 nm;Ca:396.847 nm;Cd:228.802 nm;Cu:324.754 nm;Mg:280.270 nm;Mn:259.373 nm;Ni:231.604 nm;Pb:220.353 nm) and instrument power(1000W)are chosen to find out that the recovery rate is 92%-110%,relative standard deviation is less than 5%. The content of Cu, Pb, Zn, Ni, Ca, Mg, Mn and Cd in the best conditions have been determined(Mn、Cd、Ni、Zn 0.00005 %~0.0080 %,Ca、Cu、Mg 0.0001 %~0.0080 %,Pb 0.0002 %~0.0080 %).