Determination of free acidity in uranyl solution by pH measurement

In this paper the modification of Ahrland's method for the determination of free acidity of uranyl solutions has been studied. The modified method gave satisfactory results because the free acidity of original saturated ammonium sulphate solution was considered. Relative error of the determination was less than 5%. Moreover this modification method is suitable for uranyl solutions containing relatively high concentrations of uranium and ratio of uranium to acid.