Abstract
A biamperometric method for the determination of sulfate has been developed. Its application to the determination of sulfate content in rubidium uranium trisulfate is discussed. Sulfate is determined by titration with lead nitrate in aqueous ethanolic medium using ferrocyanide-ferricyanide redox system as biamperometric indicator. Initially, the method has been tested for standard. K2SO4 solutions. In case of Rb2 U(SO4)3, since uranium interferes, it is precipitated as ammonium diuranate and excess ammonia is removed prior to the titration. Precision of better than 0.3% was achieved with no significant bias.
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