Abstract: Determination of Forteen Rare Earths Impurities in High Purity Nd_(2)O_3 by P_(507) Extraction Chromatography Separation-Spark Source Mass SpectrometrySui Xigun;Wang Zishu;Huang Furong(Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China)Abstract:The separation of rare earths impurities in high purity Nd2O3 have been carried out with P507 extraction chromatograpby hydrochloric acid-ammonium chloride as eluant.The method of preconcentration and the determination conditions of spark source mass spectromatry have been selected.The determination requirement of rare earths impurities in 99.9999% Nd2O3 is achieved.Keywords:P_(507)extraction chromatography,high purity Nd_2O_3,spark source mass spectrometry