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研究了以H[DEHP] 试剂为固定相,盐酸、硫酸为流动相,萃取柱色谱分离稀土。稀土元素间的平均分离系数β_(HCl)为3.79,β_(H_2SO_4)为4.57,HCl体系和H_2SO_4体系的β_(La)-Ca分别高达28.5和26.3,其洗脱酸度很低,只是HEH[EHP]体系的1/10～1/14。
H [DEHP] reagent was used as the stationary phase, hydrochloric acid and sulfuric acid as the mobile phase, and the rare earths were separated by column chromatography. The average separation coefficient of rare earth elements was 3.79 and β_ (H_2SO_4) was 3.79, β_ (La) -Ca in HCl system and H_2SO_4 system were as high as 28.5 and 26.3, respectively. The elution acidity was very low, only HEH [EHP ] System 1/10 ~ 1/14.