Electroanalysis of the binding and adsorption of Hg2+ with seleno aminoacids by differential pulse and elimination voltammetry at the Au-disk electrode

Gilsanz C; Gusmao R; Chekmeneva E; Serrano N; Diaz-Cruz JM; Arino C; Esteban M

Electrochimica Acta, Vol.56, No.17, 5988-5992, 2011

DOI10.1016/j.electacta.2011.04.102 Export Citation

Electroanalysis of the binding and adsorption of Hg2+ with seleno aminoacids by differential pulse and elimination voltammetry at the Au-disk electrode

Gilsanz C, Gusmao R, Chekmeneva E, Serrano N, Diaz-Cruz JM, Arino C, Esteban M

The complexation of Se-aminoacids selenomethionine (SeMet) and selenocystine (SeCyst) with Hg2+ was investigated by differential pulsed voltammetry (DPV) on Au-disk electrode. Complexation processes are proposed from the Gaussian Peak Adjustment analysis of DPV titration data. Main complexes were both 1:1 Hg:SeMet and Hg:SeCyst, although the formation of 2:1 complexes can be also proposed for Hg:SeCyst. Elimination voltammetry with linear scan was applied to investigate the adsorption of the ligands and the complexes on the Au surface. (C) 2011 Elsevier Ltd. All rights reserved.

Keywords:Mercury;Selenoaminoacids;Au-disk electrode;Elimination voltammetry with linear scan (EVLS);Gaussian Peak Adjustment (GPA)