Adsorptive stripping voltammetry of nickel at a bare glassy carbon electrode

摘要

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 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.