Reduction of selenious acid by hydrazine sulphate. Volumetric determination of selenium

Summary A volumetric method of estimating selenium, depending upon the reduction of selenious acid by excess hydrazine sulphate solution and titration of the excess against KIO₃ to the iodine monochloride end point, has been described. Determination of tellurium on these lines is suggested.The author is indebted to Professor S. S.Joshi for facilities and kind interest in the work. The award of a Scientific Man Power Committee Research Fellowship is also gratefully acknowledged.