P_（507）萃淋树脂分离－火花源质谱法测定高纯Gd_2O_3中痕量稀土杂质

P_(507)Extraction Chromatographic Separation Spark Source Mass Spctrometric Determination of 14 Rare Earths Impurities in High Purity Gadolinium Oxide

本文采用萃取色谱法，以Ｐ５０７萃淋树脂为固定相，以ＨＣｌ－ＮＨ４Ｃｌ体系为洗脱液，研究了９９．９９９％～９９．９９９９％高纯Ｇｄ２Ｏ３中稀土杂质和Ｇｄ基体的分离方法，并选择了富集方法和火花源质谱测定条件，达到了纯度为９９．

The separation of rare earth impurities in high purity gadolinium oxide have been carried out with 2-ethylhexyl hydrogen- 2-ethylhexyl phoshonate (P507) extraction chromatography ; hydrochloric acid-ammonium chloride serves as eluant. The method of preconcentration and the determination conditions of spark source mass spectrometry have been selected. The measured purity of gadolinium oxide is up to 99.9999 %.