稀土元素的分离与测定是稀土分析中比较困难的任务,而铕与钆的分离则更是稀土元素相互分离的难点之一。文献采用柱液相色谱,以涂渍P507的硅球为固定相,用HCl、HCl-NH_4Cl为流动相使铕钆分离,但分辨率较低、淋洗体积大。我们认为用柱液相色谱分离稀土元素时,固定相中的P507与稀土元素的键合能力由镧至镥的次序逐渐增强;若在流动相 Rare earth element separation and determination of rare earth analysis is more difficult task, and the separation of europium and gadolinium is more difficult to separate one of the rare earth elements. Literature using column liquid chromatography with P507 coated silica gel as the stationary phase, with HCl, HCl-NH_4Cl as the mobile phase of europium-gadolinium separation, but lower resolution, rinse volume. We believe that when using column liquid chromatography separation of rare earth elements, the binding capacity of P507 and rare earth elements in the stationary phase gradually increased from lanthanum to 镥 order; if the mobile phase