萃取色谱分离-原子发射光谱测定超高纯氧化铽和氧化镝中痕量稀土杂质  

Determination of Rare Earth Impurities in Ultra_high Purity Tb 4O 7 and Dy 2O 3 by Extraction Chromatography_Atomic Emission Spectrometry

作　　者：李武帅[1] 彭春霖[1] 袁甫[1] 綦文娣[1] 刘晓辉[1] 柯文武 

机构地区：[1]中国科学院长春应用化学研究所国家电化学和光谱分析研究中心

出　　处：《岩矿测试》1997年第3期196-200,共5页Rock and Mineral Analysis

摘　　要：研究了２＿乙基己基膦酸单２＿乙基己酯萃取色谱分离＿原子发射光谱测定超高纯Ｔｂ４Ｏ７和Ｄｙ２Ｏ３中痕量稀土杂质，方法可用于纯度（质量分数ｗ）为９９９９９９％～９９９９９９９％Ｔｂ４Ｏ７和Ｄｙ２Ｏ３的分析。在铽和镝的样品中其它稀土杂质的回收率分别为７３％～１３３％和９５％～１２０％，６次测定平均值的相对标准偏差分别为５８％～２２％和７９％～２０％，分离周期为９ｈ和１２ｈ。An extraction chromatographic method for separating rare earth elements (REE) from ultra_high purity Tb 4O 7 and Dy 2O 3 was developed by using HCl as eluent and 2_ethylhexylhydrogen_2_ethylhexy phosphonate as a stationary. 14 REE impurities were then determined by atomic emission spectrometry. The recoveries of REE impurities in ultra_high purity Tb 4O 7 and Dy 2O 3 were 73%～133% and 95%～120% with precision of 5.8%～22% RSD( n =6) and 7.9%～20% RSD( n =6) respectively. The method can be applied to the determination of REE impurities in Tb 4O 7 and Dy 2O 3 with a purity grade of 99.9999%～99.99999%.

关 键 词：原子发射光谱 氧化铽 氧化镝 稀土杂质 

分 类 号：O614.341[理学—无机化学] O614.342[理学—化学]