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

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 %).