Potentiometric determination of hexacyanoferrate [III] and bismuth [III] analysis of mixtures

ABSTRACT

A rapid, accurate and highly selective method has been developed for estimation of hexacyanoferrate [III] based on reduction with iodide to hexacyanoferrate [II] and Bismuth [III] based on separating it as bismuth hexacyanoferrate [III] and reduction of excess reagent with iodide. Unconsumed iodide is then titrated with mercury [II] using silver amalgam as the indicator electrode. The method is applied to the successful analysis of binary as well as ternary mixtures with a variety of metal ions