Direct detection of lead in RTIL using DPASV on BDD film microcells and determination of concentration factor after extraction from aqueous samples

Détection directe du plomb dans des liquide ioniques à température ambiante par Voltamétrie à balayage anodique impulsionnelle différentielle sur un film de diamant dopé au bore et détermination du facteur de concentration après extraction d'une phase aqueuse

Sbartai, A. ; Namour, P. ; Sarrut, N. ; Krejci, J. ; Kucerova, R. ; Hamlaoui, M. ; Jaffrezic Renault, N.

Type de document
Article de revue scientifique à comité de lecture
Langue
Anglais
Affiliation de l'auteur
UNIVERSITY OF LYON INSTITUTE OF ANALYTICAL SCIENCES UMR 5280 LYON FRA ; IRSTEA LYON UR MALY FRA ; CEA LETI GRENOBLE FRA ; BVT TECHNOLOGIES AS BRNO CZE ; BVT TECHNOLOGIES AS BRNO CZE ; UNIVERSITY OF ANNABA LABORATORY EPEV ANNABA DZA ; UNIVERSITY OF LYON INSTITUTE OF ANALYTICAL SCIENCES UMR 5280 LYON FRA
Année
2012
Résumé / Abstract
European Water Framework Directive and the Predicted Non Effect Concentrations for water organisms require determination of lead at very low concentrations: 1.2 lg/L. These low concentrations, generally in complex sample matrixes, have influence on the sensitivity and accuracy of the analytical method. Hence, prior to a determination, a clean-up and/or enrichment step is highly necessary. In this work, for the first time, the determination of Pb was performed using Differential Pulse Anodic Stripping Voltammetry (DPASV) on a Boron-Doped Diamond microcell directly in the room temperature ionic liquid (RTIL) extracting phase: Butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide which contained the complexing agent Trioctylphosphine oxide (TOPO). The calibration curves with and without TOPO are linear in the concentration range 0–4 lg/L of Pb, with a detection limit (DL) of 0.3 lg/L. The optimum conditions for higher concentration factor were determined: the aqueous phase should be a 0.1 M citrate buffer with pH 2. The obtained concentration factor was 5.0 ± 0.2 for lead in RTIL without chelating agent TOPO, and 9.0 ± 0.10 in IL with chelating agent TOPO.
Source
Journal of Electroanalytical Chemistry, num. 686, p. 58 - 62

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