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

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.