【摘要】 <正> 薄层色谱法与纸色谱法相比,具有简易、快速、灵敏度高和负载量大等优点。因此,用薄层色谱法分离铀、钍和希土,或其它放射性元素,也是核化学和放射化学感兴趣的课题。迄今为止,有关文献资料还不多,其中主要有Вагинл和Волыней等。Specker和Jung等做了一些有益的探索、取得了可喜进展。更多还原

【Abstract】 In this paper is reported a method for the separation of the rare earths, Cd(Ⅱ), Co(Ⅱ), Pb(Ⅱ), Cu(Ⅱ), Zn(Ⅱ), U(Ⅵ) and Th(Ⅳ) by using thin-layer chromatography. When the optimum volume ratio of each component of the developing solvent of mono tetradecyl phosphoric acid-ethyl ether-concentrated HNO3 is selected to be 4.0:40.0:0.8, Cd(Ⅱ) or Co(Ⅱ), Pb(Ⅱ), Cu(Ⅱ) and Zn(Ⅱ) are satisfactorily separated from the rare earths (La-Gd) despite being present in 105 fold excess over them, and the adjacent rare earths of La-Gd are easily separated. When the volume ratio of each component of the developing solvent is selected to be 2.0:42.0:2.5, U(Ⅵ) or Th(Ⅳ) can be completely separated from the rare earths (Tb-Lu) despite being present in 105 fold excess over them, and the adjacent rare earths of Tb-Lu also are completely separated.更多还原