title: Analytical chemistry of unusual oxidation states: the polarography of vanadium(IV) in cyanide medium.
abstract: The polarographic reduction wave for vanadium(IV) in cyanide medium has been studied and the effect of cyanide concentration on the diffusion current and half-wave potential has been interpreted, using the theory of irreversible but diffusion-controlled reduction. Coulometric experiments suggest a two-electron transfer, and the shift of half-wave potential corresponds to the addition of one cyanide ion during the reduction step. The proportionality of wave-height to vanadium concentration in the used alkaline cyanide medium indicates a possible analytical unity. The half-wave potential is about -1.1 V.
authors.affiliation: Department of Analytical Chemistry, Faculty of Science, Analytical Chemistry Section of the Consejo Superior de Investigaciones Cientificas (C.S.I.C.) Salamanca, Spain.
authors.forename: J H
authors.initials: JH
authors.lastname: Mendez
authors.forename: A S
authors.initials: AS
authors.lastname: Misiego
authors.forename: F L
authors.initials: FL
authors.lastname: Conde