title: Voltammetric reduction of nickel and cobalt dimethylglyoximate.
abstract: The determination of cobalt and nickel in aqueous solutions by stripping voltammetry after adsorptive preconcentration is an established procedure. The method is highly sensitive, but there is some controversy concerning the reasons for the excellent sensitivity. Using a variety of voltammetric techniques, we have determined that the reduction of nickel dimethylglyoximate in an ammonia buffer is consistent with an overall process involving 16 or possibly 18 electrons. This hypothesis is confirmed by independently measuring the total quantity of metal adsorptively deposited on the mercury electrode and comparing the amount with the quantity of electricity required for its reduction.
authors: Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6, Canada.
authors: D V
authors: DV
authors: Vukomanovic
authors: J A
authors: JA
authors: Page
authors: G W
authors: GW
authors: Vanloon