ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Electrodeposition of mercury film on electrodes modified with clay minerals

Z. Navrátilová and L. Vaculíková

Department of Chemistry, Faculty of Sciences, University of Ostrava, CZ-701 03 Ostrava, Czech Republic

E-mail: zuzana.navratilova@osu.cz

Received: 20 March 2006  Revised: 5 May 2006  Accepted: 2 June 2006

Abstract: A new type of carbon paste electrode modified with clay mineral and covered with a mercury film is presented in this work. Electrodeposition of the mercury film was performed on the carbon paste electrode modified with montmorillonite. The mercury film was deposited by both electrodeposition in situ and a preliminary electrodeposition. The pre-deposited film of mercury showed to be suitable for anodic stripping voltammetry. An open-circuit sorption of Cd, Pb, and Cu with subsequent anodic stripping voltammetry exhibited higher current responses of metals. Besides the enhanced sensitivity superior separation of the current responses during a simultaneous stripping of metals is expected to be achieved by means of the newly prepared electrode.

Keywords: electrodeposition - carbon paste electrode - mercury - clay minerals - anodic stripping voltammetry

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-006-0063-3

Chemical Papers 60 (5) 348–352 (2006)