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本文研究了用磷酸三(2—乙基己基)酯(以下简称为TIOP)作固定相、硝酸等为流动相的萃取色层法在分离Np(Ⅳ)、Np(Ⅴ)和Np(Ⅵ)中的应用。利用Np(Ⅳ)、Np(Ⅴ)和Np(Ⅵ)在TIOP—硅胶柱上分配系数的差异使不同价态的镎得到分离。Np(Ⅴ)不被TIOP吸附,Np(Ⅳ)、Np(Ⅵ)分别用HNO_3+HF、HNO_3+HF+Fe(NH_2SO_3)_2洗脱,从而达到定量分离。文中并对光的影响进行了讨论。最后简单叙述了用TIOP—萃淋树脂来分离Np(Ⅳ)、Np(Ⅴ)和Np(Ⅵ)的实验。
In this paper, the separation of Np (Ⅳ), Np (Ⅴ) and Np (Ⅵ) with tris (2-ethylhexyl) phosphate (hereinafter referred to as TIOP) as stationary phase and nitric acid as mobile phase was studied. In the application. The differences in partition coefficients of Np (Ⅳ), Np (Ⅴ) and Np (Ⅵ) on TIOP-silica gel columns were used to separate the different valences. Np (Ⅴ) was not adsorbed on TIOP. Np (Ⅳ) and Np (Ⅵ) were separated by HNO_3 + HF and HNO_3 + HF + Fe (NH_2SO_3) _2 respectively. The paper also discusses the influence of light. Finally, the experiment of separating Np (Ⅳ), Np (Ⅴ) and Np (Ⅵ) with TIOP-extraction resin is briefly described.