Adsorptive stripping voltammetry of nickel at a bare glassy carbon electrode

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 120s was linear from 2x10(-9) to 1x10(-7)molL(-1). The detection limit was 8.2x10(-10)molL(-1). The relative standard deviation for a solution containing 2x10(-8)molL(-1) of Ni(II) was 4.1%. The proposed procedure was applied for Ni(II) determination in certified water reference materials.