☆ 4.7 Article

Voltammetric sensing of lead and cadmium using poly(4-azulen-1-yl-2,6-bis(2-thienyl)pyridine) complexing films

JOURNAL OF ELECTROANALYTICAL CHEMISTRY (2013)

Journal

JOURNAL OF ELECTROANALYTICAL CHEMISTRY

Volume 693, Issue -, Pages 67-72

Publisher

ELSEVIER SCIENCE SA

DOI: 10.1016/j.jelechem.2013.01.034

Keywords

4-Azulen-1-yl-2,6-bis(2-thienyl)pyridine; Modified electrodes; Voltammetric sensing; Lead; Cadmium

Categories

Chemistry, Analytical Electrochemistry

Funding

European Social Fund project Postdoctoral Program for Advanced Research in the field of nanomaterials [POSDRU/89/1.5/S/54785]
UEFISCDI [15/2011]
[POSDRU/107/1.5/S/76909]

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Abstract

Complexing polymer-coated electrodes have been synthesized by oxidative electropolymerization of 4-azulen-1-yl-2,6-bis(2-thienyl)pyridine (monomer L). The novel chelating chemically modified electrodes were used for the electrochemical detection of Pb(II) and Cd(II) ions by means of the chemical preconcentration-anodic stripping technique. The electrode material showed a particular selectivity towards lead ions, even in the presence of a large excess of other metal cations. Detection limits of 0.7 nM and 10 nM were obtained for lead(II) and cadmium(II) ions, respectively. The modified electrodes have been used for the determination of lead in natural water and tap-water. (C) 2013 Elsevier B.V. All rights reserved.

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