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Lead ion sensor with electrodes modified by imidazole-functionalized polyaniline

Kumar, Prajwal and Joseph, Alex and Ramamurthy, Praveen C and Subramanian, Sankaran (2012) Lead ion sensor with electrodes modified by imidazole-functionalized polyaniline. In: MICROCHIMICA ACTA, 177 (3-4). pp. 317-323.

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Official URL: http://dx.doi.org/10.1007/s00604-012-0787-4

Abstract

Glassy carbon electrodes (GCE) and carbon paste electrodes (CPE) were modified with imidazole functionalized polyaniline with the aim to develop a sensor for lead (II) in both acidic and basic aqueous solution. The electrodes were characterized by cyclic voltammetry and differential pulse adsorptive stripping voltammetry. The limit of detections obtained with glassy carbon electrode and carbon paste electrode are 20 ng mL(-1) and 2 ng mL(-1) of lead ion, respectively. An interference study was carried out with Cd(II), As(III), Hg(II) and Co(II) ions. Cd(II) ions interfere significantly (peak overlap) and As(III) has a depressing effect on the lead signal. The influence of pH was investigated indicating that bare and modified GCE and CPE show optimum response at pH 4.0 +/- 0.05.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to Springer wien
Keywords: Conducting polymer;Modified glassy carbon electrode;Modified carbon paste electrode;Differential pulse adsorptive stripping voltammetry;Lower limit of detection (LLOD)
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 14 Jul 2012 07:04
Last Modified: 14 Jul 2012 07:04
URI: http://eprints.iisc.ernet.in/id/eprint/44688

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