Determination of Trace of Cobalt in Complex Matrices by Adsorptive Stripping Voltammetry at a Lead Film Electrode

作者：Tyszczuk Katarzyna; Rutyna Iwona; Korolczuk Mieczyslaw^*

来源：Electroanalysis, 2009, 21(6): 779-782.

DOI：10.1002/elan.200804463

• Cobalt
• Trace determination
• Complex matrix
• Voltammetry
• Lead film electrode

An adsorptive stripping voltammetric procedure for the determination of cobalt in a complex matrices at an in situ plated lead film electrode was described. The procedure exploits the enhancement effect of a cobalt peak observed in the system Co(II)-nioxime-piperazine-1,4-bis(2-ethanesulfonic acid)-cetyltrimethylammonium bromide. The calibration graph was linear from 5 x 10(-10) to 2 x 10(-8) mol L(-1) and from 1 x 10(-10) to 1 x 10(-9) mol L(-1) for the accumulation times 120 and 600 s, respectively. The detection limit (based on the 3 sigma criterion) for Co(II) following accumulation time of 600 s was 1.1 x 10(-11) mol L(-1). The interference of high concentrations of foreign ions and surfactants was studied.

• 出版日期2009-3