Determination of Trace REEs and Non-REEs Impurities in High Pure Lanthanum Oxide by Inductively Coupled Plasma Mass Spectrometry

A analytical method for the directly determination of 14 REEs and 18 Non-REEs impurities in high pure La 2O 3 by ELAN 9000 inductively coupled plasma mass spectrometry had been established. The matrix and spectral interference was studied. The signal suppression caused by La matrix was compensated by adding internal reference element as In and the spectral interference was also corrected by correction equations for interfered ions as 142Ce, 160Gd. The detection limits for REEs are 0.001 2-0.009 3μg/g and 0.002 3-0.67 μg/g for Non-REEs. The recovery is 92%-108% and the precision (RSD) is 0.4%- 3.3%. Finally, the method is suited for rapidly determination of REEs and Non-REEs impurities in La 2O 3 with purity of 99.99%-99.999 9%.