纸上高压电泳分离-荧光光度法测定钇镧镥

Separation and determination of yttrium,lanthanum,lutetium by high voltage paper electrophoresis coupled with spectrophotofluorimetry

以柠檬酸为电解液，纸上高压电泳法分离稀土元素钇、镧、镥，分离后的稀土离子在纸上与桑色素（morin）形成络合物，用426nm激发光照射，纸上络合物产生荧光，在494nm处测定荧光强度。Y^3＋，La^3＋和Lu^3＋的质量浓度分别在0．1～30ng／μL，0．5～50ng／μL和0．15～40ng／μL范围内与荧光强度成良好的线性关系；检出限分别为0．03，0．15，0．045ng／μL。方法试液用量少，操作简单，已成功用于分离、测定舍成试样中钇、镧、镥。

Mixed rare-earth metal ions of Y^3＋ , La^3＋ , Lu^3＋, are separated in the medium of citric acid by high voltage paper electrophoresis. These complexes of Y^3 ＋ , La^3 ＋ , Lu^3 ＋ with morin （2＇, 3,4＇, 5,7-pentahydroxyflavone） are irradiated with an exciting light at 426 nm to produce a fluorescence on the filter paper,and then the fluorescence intensity of the complexes on the filter paper were determined at the wavelength of 494 nm. The detection limits of Y^3＋ , La^3＋ , Lu^3 ＋ are 0.30,0.15,0. 045 ng/μL respectively. The method had been successfully applied to the determination of Y, La, Lu in synthetic samples of mixed rare- earth.