Electrochemical Boron-Doped
Diamond Film Microcells
Micromachined with Femtosecond Laser: Application to the Determination
of Water Framework Directive Metals
posted on 2016-02-20, 20:15authored byAmel 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.