Skip to Main content Skip to Navigation
Journal articles

Study of interactions of concentrated marine dissolved organic matter with copper and zinc by pseudopolarography

Abstract : The interaction of dissolved organic matter (DOM) with copper and zinc in a concentrated seawater sample was characterised by pseudopolarography. Measurements performed at increased concentrations of copper(II) ions showed successive saturation of active DOM sites which indicate possible partition of copper between (i) free or labile complexes, (ii) reduced and released within the potential window of the method, and (iii) electroinactive copper complexes. Pseudopolarograms measured at pH 4 indicate a release of copper which was bound to the active sites of DOM that formed non-labile complexes. Variation of the peak position and half-peak width along the scanned deposition potentials and with the increasing concentration of copper bear the information about the complex electrochemical processes at the electrode surface and in the bulk of the solution. Pseudopolarograms of zinc showed a strong dependence of the peak current and the peak position along the scanned deposition potentials on pH values, indicating preferentially complexation of zinc with carboxylic-like active sites of DOM in the measured sample. Pseudopolarography is a valuable method in the trace metal complexation and speciation studies, serving as a fingerprint of the analysed sample.
Complete list of metadata

Cited literature [14 references]  Display  Hide  Download
Contributor : Cédric Garnier Connect in order to contact the contributor
Submitted on : Monday, January 5, 2015 - 5:03:54 PM
Last modification on : Tuesday, December 7, 2021 - 1:52:03 PM
Long-term archiving on: : Monday, April 6, 2015 - 10:15:35 AM


P11 Nicolau 2008.pdf
Files produced by the author(s)




Rudy Nicolau, Yoann Louis, Dario Omanovic, Cédric Garnier, Stéphane Mounier, et al.. Study of interactions of concentrated marine dissolved organic matter with copper and zinc by pseudopolarography. Analytica Chimica Acta, Elsevier Masson, 2008, 618, pp.35-42. ⟨10.1016/j.aca.2008.04.038⟩. ⟨hal-01096828⟩



Record views


Files downloads