An original nitrate sensor based on silver nanoparticles electrodeposited on a gold electrode |
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| Authors: | Katia Fajerwerg Vaiata Ynam Bruno Chaudret Véronique Garçon Danièle Thouron Maurice Comtat |
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| Institution: | 1. Laboratoire de Chimie de Coordination, UPR 8241 CNRS, 205 Route de Narbonne, 31077 Toulouse CEDEX 4, France;2. Laboratoire d''Etudes en Géophysique et Océanographiques Spatiales, UMR 5566, 18 Avenue Edouard Belin, 31401 Toulouse CEDEX 9, France;3. Laboratoire de Génie Chimique, UMR 5503 Université Paul Sabatier118, Route de Narbonne, 31062 Toulouse CEDEX 9, France |
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| Abstract: | The electroreduction of nitrate in synthetic seawater was investigated by cyclic voltammetry (CV) at a bare gold electrode modified by electrodeposited silver nanoparticles (AgNPs). The AgNPs were generated by chronoamperometry using a charge, Q, lower than the theoretical one corresponding to a silver monolayer. In these conditions, a linear range for nitrate determination is obtained from 10·10-6 mol L-1 to 10·10-3 mol L-1. Such a low limit of detection was achieved due to the combination of two chemical reactions coupled with electron transfer. |
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