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研究了离子交换、Fe(OH)_3吸附共沉淀和磷酸三丁酯萃取相结合以制备大量无载体UX_1的方法。磷酸三丁酯在一定量的盐酸存在下,能很好地萃取铁元素,而对溶液中示踪量的UX_1却几乎不萃取。磷酸三丁酯萃取铁元素的分配系数a与溶液中存在的盐酸浓度的关系如图1所示。(原始溶液中FeCl_3的浓度力0.1N,有机相与水相之本和比力1:1,萃取在室温下进行,铁盐浓度的测定是以光电比色计借NH_4CNS使溶液显色而进行的。)
The methods of ion exchange, Fe (OH) 3 adsorption coprecipitation and tributyl phosphate extraction were combined to prepare a large amount of carrier-free UX_1. Tributyl phosphate is a good source of iron for extraction in the presence of a certain amount of hydrochloric acid, while UX_1, which is traceable in solution, is almost not extracted. The relationship between the partition coefficient a of iron tributyl phosphate extraction and the hydrochloric acid concentration present in the solution is shown in FIG. 1. (The original solution concentration of FeCl_3 force 0.1N, the organic phase and the aqueous phase of this and the ratio of 1: 1, the extraction was carried out at room temperature, the determination of iron salt concentration is a photoelectric colorimeter by NH_4CNS solution color development of.)