在U(Ⅵ)或U(Ⅳ)的硫酸溶液中对游离H_2SO_4浓度的测定

DETERMINATION OF THE CONCENTRATION OF FREE H_2SO_4 MOLECULE IN U(Ⅵ) OR U(Ⅳ)-SULFURIC ACID SOLUTION

摘要: <正> 铀除了用于军事目的外,它还是一种人工可控制的巨大核能源。因此,人们对轴在分离与制备等方面的研究一直很重视。例如,用化学法研究铀同位素的分离方法时,要求快速准确地测出铀溶液中的游离H_2SO_4浓度。但是由于铀的水解作用,不能用酸碱滴定法准确地测定出酸的浓度,加之溶液的酸度范围又不适合酸度计测定,那么寻求准确快速的测定方法就显得非常必要。

Abstract: In this paper, it is suggested and discussed that condition and method of the concentration determination of free H_2SO_4 molecule in U(VI) or U(IV)H_2SO_4 solution. Taking UO_4~(2+) (or U~(4+))<0.10 mol/l and UO_2~(2+)/H~+ (or U~(4+)/H~+)≤1 as essential prerequisite, making SCN~-/UO_2~(2+) (orSCN~-/U~(4+))=20,C_2O_4~(2-)/UO_2~(2+) (or C_2O_4~(2-)/U_~(4+))=0.80. F~-/UO_2~(2+) (or F~-/U~(4+))=0.80,DMF≥60% and determination error is smaller than±1%, which is a very fast and accurate determining method.