Voltammetric determination of trace mercury at a sonogel-carbon electrode modified with poly-3-methylthiophene

Hanane Zejli; Patrick Sharrock; J L Hidalgo-Hidalgo de Cisneros; I Naranjo-Rodriguez; Khalid R Temsamani

doi:10.1016/j.talanta.2005.04.060

Voltammetric determination of trace mercury at a sonogel-carbon electrode modified with poly-3-methylthiophene

Talanta. 2005 Nov 15;68(1):79-85. doi: 10.1016/j.talanta.2005.04.060. Epub 2005 May 31.

Authors

Hanane Zejli¹, Patrick Sharrock, J L Hidalgo-Hidalgo de Cisneros, I Naranjo-Rodriguez, Khalid R Temsamani

Affiliation

¹ Equipe de recherché Bioelectrochemie et Systèmes Interfaciaux, University Abdelmalek Essaadi, Morocco.

PMID: 18970288
DOI: 10.1016/j.talanta.2005.04.060

Abstract

The sonogel-carbon electrode is a new class of sol-gel electrode that exhibit favourable mechanics and electrics properties to be used as electrochemical sensor. In this paper, a modified sonogel-carbon electrode is proposed to determine mercury at trace levels. The modified electrode is obtained by electropolymerization of 3-methylthiophene on the surface of a bare sonogel-carbon electrode. This electrode shows high selectivity and sensitivity and linear response towards Hg(II), with a detection limit of 1.4x10(-3)mgl(-1). The electrode is reusable by a simple chemical cleaning procedure. No deterioration was observed in the electrode response during at least 1 week of successive measurements.