Optimization of digestion procedure for the determination of nickel in wine by differential-pulse adsorptive stripping voltammetry

Abstract

A method for the determination of nickel in wine by differential-pulse adsorptive stripping voltammetry using dimethylglyoxime as complexing agent was optimised using experimental design methodology. In order to destroy organic matter, two different methods of treating the sample were considered. The UV irradiation method was selected and optimised for a smaller degree of uncertainty. The recovery factor obtained with five replicates was 1.02 ± 0.05.