Electroanalytical Device for Cadmium Speciation in Waters. Part 1: Development and Characterization of a Reliable Screen‐Printed Sensor |
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| Authors: | Olivier Zaouak Laurent Authier Cyril Cugnet Alain Castetbon Martine Potin‐Gautier |
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| Institution: | Université de Pau et des Pays de l'Adour/CNRS, Laboratoire de Chimie Analytique et Bio‐Inorganique UMR 5254 IPREM, 2 avenue Angot, 64053?PAU Cedex 9, France |
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| Abstract: | A reliable screen‐printed sensor for cadmium speciation analysis is presented here. Its development has been focused on the achievement of a reproducible and repeatable sensor. The electrode construction and its surface coating are discussed in detail. The optimized procedure has permitted to obtain very accurate sensors with detection limit of 0.2 μg (Cd) L?1 using SWASV for only 60 s of deposition time. The electrochemically accessible, i.e. potentially bioavailable, fraction of the cadmium present in an untreated river water sample has been successfully quantified without degassing. These results give a glimpse of the potential of this membrane‐free sensor in real matrices. |
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| Keywords: | Stripping voltammetry Screen‐printed electrode Cadmium Speciation Real sample Sensors |
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