Polyanthranilic acid microspheres as an active material for electrochemical detection of sub-picomolar lead ion concentrations in aqueous media

Varghese, EV and Thomas, B and Schwandt, C and Ramamurthy, PC and Joseph, A (2022) Polyanthranilic acid microspheres as an active material for electrochemical detection of sub-picomolar lead ion concentrations in aqueous media. In: Ionics .

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Abstract

An electrochemical sensor for the detection of lead ion in aqueous media has been developed by the modification of carbon paste electrode (CPE) with polyanthranilic acid (PANA) microspheres. PANA microspheres have been synthesized by the interfacial polymerization technique and characterized using Fourier-transform infrared spectroscopy, scanning electron microscopy, and X-ray diffraction. The electrochemical response of the PANA-modified CPE to Pb2+ ions has been evaluated using differential pulse anodic stripping voltammetry (DPASV). Various electrode parameters governing sensor sensitivity, such as preparation of active layer by drop casting, potential of Pb deposition, pH of deposition solution, and time of deposition, have been optimized for maximum performance. The electrochemical characterization of the PANA-modified CPE has revealed two linear response regimes for Pb2+ ions, one in the range from 1 × 10−6 to 1 × 10−10 M, and one from 1 × 10−10 to 1 × 10−14 M with an LOD of 7.12 × 10−14 M (14.7 pg/L). The selectivity of the PANA-modified CPE has been tested against several cations and anions and is unaffected by Zn2+, NO3−, and SO42− ions. The stability and reusability of the electrode are satisfactory. Graphical abstract: [Figure not available: see fulltext.].

Item Type:	Journal Article
Publication:	Ionics
Publisher:	Springer Science and Business Media Deutschland GmbH
Additional Information:	The copyright for this article belongs to the Springer Science and Business Media Deutschland GmbH.
Keywords:	Carbon; Chemical detection; Deposition; Electrochemical electrodes; Electrochemical sensors; Fourier transform infrared spectroscopy; Ions; Reusability; Scanning electron microscopy; Stripping voltammetry, Active material; Aqueous media; Carbon paste electrode; Detection of lead ions; Differential pulse anodic stripping voltammetry; ELectrochemical detection; Ion concentrations; Lead ions; Modified carbon paste electrode; Polyanthranilic acid, Microspheres
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	28 Jul 2022 09:13
Last Modified:	28 Jul 2022 09:13
URI:	https://eprints.iisc.ac.in/id/eprint/75025

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