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Electrochemical Boron-Doped Diamond Film Microcells Micromachined with Femtosecond Laser: Application to the Determination of Water Framework Directive Metals

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journal contribution
posted on 2016-02-20, 20:15 authored by Amel Sbartai, Philippe Namour, Abdelhamid Errachid, Jan Krejči, Romana Šejnohová, Louis Renaud, Mohamed Larbi Hamlaoui, Anne-Sophie Loir, Florence Garrelie, Christophe Donnet, Hervé Soder, Eric Audouard, Julien Granier, Nicole Jaffrezic-Renault
Planar electrochemical microcells were micromachined in a microcrystalline boron-doped diamond (BDD) thin layer using a femtosecond laser. The electrochemical performances of the new laser-machined BDD microcell were assessed by differential pulse anodic stripping voltammetry (DPASV) determinations, at the nanomolar level, of the four heavy metal ions of the European Water Framework Directive (WFD): Cd­(II), Ni­(II), Pb­(II), Hg­(II). The results are compared with those of previously published BDD electrodes. The calculated detection limits are 0.4, 6.8, 5.5, and 2.3 nM, and the linearities go up to 35, 97, 48, and 5 nM for, respectively, Cd­(II), Ni­(II) Pb­(II), and Hg­(II). The detection limits meet with the environmental quality standard of the WFD for three of the four metals. It was shown that the four heavy metals could be detected simultaneously in the concentration ratio usually measured in sewage or runoff waters.

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