萃取色谱分离-原子发射光谱测定氧化钐、氧化铕、氧化钆中14个稀土杂质  

Determination of 14 Rare Earth Impurities in Sm 2O 3,Eu 2O 3 and Gd 2O 3 of Ultra_high Purity by Extraction Chromatography_Atomic Emission Spectrometry

作　　者：李武帅[1] 彭春霖[1] 袁甫[1] 綦文娣[1] 匡洲献 徐承浩 

机构地区：[1]中科院长春应用化学研究所国家电化学和光谱研究分析中心

出　　处：《分析测试学报》1998年第1期18-21,共4页Journal of Instrumental Analysis

摘　　要：用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Ｓｍ２Ｏ３、Ｅｕ２Ｏ３、Ｇｄ２Ｏ３中痕量稀土杂质，可用于纯度为９９９９９９％～９９９９９９９％（不含非稀土杂质）Ｓｍ２Ｏ３、Ｅｕ２Ｏ３、Ｇｄ２Ｏ３的纯度分析，１４个稀土杂质的回收率在６７％～１３３％之间，相对标准偏差±６４％～±１８４％，分离周期１０～１４ｈ。A chemical separation_atomic emission spectrometric method was established for the determination of 14 rare earth impurities in Sm 2O 3,Eu 2O 3 and Gd 2O 3 of ultra_high purity(99 9999%～ 99 99999 %).Extraction chromatography with mono_2_ethylhexyl_2_ethylhexyl phosphonate (commercial name:P507) as the stationary phase was employed for the separation of rare earth impurities. All the rare earth impurities were eluted with HCl+NH 4Cl solution and 4 mol·L -1 HCl solution. The impurities were then determined by atomic emission spectrometry .The recoveries are 67%～133%, while the relative standard deviations are 6 4%～18 4%.The separation period is 10～14 h.

关 键 词：萃取色谱 氧化钐 氧化铕 氧化钆 稀土杂质 

分 类 号：O614.33[理学—无机化学]