Adsorptive stripping voltammetry of nickel at a bare glassy carbon electrode

Abstract

A bare glassy carbon electrode is applied to nickel determination by adsorptive stripping voltammetry in the presence of dimethylglyoxime as a complexing agent. A procedure of nickel determination and electrode regeneration was proposed. The calibration graph for Ni(II) for an accumulation time of 120 s was linear from 2 × 10−9 to 1 × 10−7 mol L−1. The detection limit was 8.2 × 10−10 mol L−1. The relative standard deviation for a solution containing 2 × 10−8 mol L−1 of Ni(II) was 4.1%. The proposed procedure was applied for Ni(II) determination in certified water reference materials.