Determination of different metals using new microsensors diamond doped with boron (BDD) in wastewater

A. Sbartai, P. Namour, A. Errachid, J. Krejči, R. Šejnohová, L. Renaud, M-L. Hamlaoui, A-S. Loir, F. Garrelie, C. Donnet, H. Soder, E. Audouard, J. Granier, N. Jaffrezic-Renaul
Universite de Lyon, FR

Keywords: sensors, MEMS


Different methods of analysis and speciation of heavy metals can be used alone or in combination, including the techniques of anodic stripping voltametry (DPASV) and the square wave (SWV). The Principe of these methods, there is an accumulation of electro-active substances on the surface of the electrode, which allows us to analyze the elements to trace. For our analyzes, we used electrodes Boosted Boron Diamond (BDD) [1] (figure1) in the first place for the detection of metals using stripping voltametry (DPASV) than the detection of uranium (SWV). For the detection of metals, conditions standard measurements are performed in a buffer solution of potassium citrate in 0.1 M pH 2; potential and deposition time respectively -1.7 V and 20 s, and early potential end are -1.7 and 0.5 V. we have shown that these microcells allow simultaneous detection of heavy metals in water(figure2), with detection limits of 0.4, 6.8, 5.5, and 2.3 nM, and linearity up to 35, 97, 48 and 5 nM, respectively, Cd (II), Ni (II) Pb (II) and Hg (II) [2].