Voltammetric determination of trace mercury at a sonogel-carbon electrode modified with poly-3-methylthiophene.
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.
Zejli
Hanane
H
Equipe de recherché Bioelectrochemie et Systèmes Interfaciaux, University Abdelmalek Essaadi, Morocco.
Sharrock
Patrick
P
Hidalgo-Hidalgo de Cisneros
J L
JL
Naranjo-Rodriguez
I
I
Temsamani
Khalid R
KR