A NEW POTENTIOMETRIC DETERMINATION OF HYDRAZINE IN THE PRESENCE OF URANIUM(IV)

The present method describes the determination of hydrazine by making use of potentiometric titration technique. The underlying principle is back titration of unreacted excess cerium remaining after the complet e oxidation of hydrazine. Standardized ferrous ammonium sulfate was us ed for titration. This method was applied to ''real samples'' generate d from a nuclear reprocessing plant wherein control of hydrazine is of paramount importance. The interference of U(IV). Cr(III), U(VI), nitr ite, and chloride was studied and of all these ions the way to elimina te the interference of U(IV) was only attempted. The relative standard deviations (RSD) for synthetic as well as ''real samples'' were deter mined. ?he method gives RSD of less than 1% in the range of 1 mg to 20 mg of hydrazine. The error in the range 3 mg to 17 mg was found to be less than 1%.