【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。更多还原

【Abstract】 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_2ethylhexyl_2ethylhexyl 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.更多还原