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９９９９９９％～９９９９９９９％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５８％～２２％和７９％～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%.
出处
《岩矿测试》
CAS
CSCD
北大核心
1997年第3期196-200,共5页
Rock and Mineral Analysis
关键词
原子发射光谱
氧化铽
氧化镝
稀土杂质
extraction chromatography, atomic emission spectrometry, ultra_high purity Tb 4O 7 and Dy 2O 3
