Repository of Research and Investigative Information

Repository of Research and Investigative Information

Baqiyatallah University of Medical Sciences

Simultaneous electrochemical sensing of thallium, lead and mercury using a novel ionic liquid/graphene modified electrode

(2015) Simultaneous electrochemical sensing of thallium, lead and mercury using a novel ionic liquid/graphene modified electrode. Analytica Chimica Acta. pp. 56-66. ISSN 0003-2670

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Abstract

In the present manuscript, an electrochemical sensor for the sensitive detection of Tl-+,Tl- Pb2+ and Hg2+ is described. A new composite electrode has been fabricated using graphene, 1-n-octylpyridinum hexafluorophosphate (OPFP), and 2,4-Cl2C6H3C(O)CHPPh3 (L), as a new synthetic phosphorus ylide. The physicochemical and electrochemical characterizations of fabricated sensor were investigated in details. The advantages of the proposed composite electrode are its ability in simultaneous electrochemical detection of Tl+, Pb2+ and Hg2+ with good selectivity, stability and no need for separating of the three species from complex mixtures prior to electrochemical measurements. The analytical performance of the proposed electrode was examined using square wave voltammetry. Tl-+,Tl- Pb2+ and Hg2+ can be determined in linear ranges from 1.25 x 10(9) to 2.00x10(-7) mol L-1. Low detection limits of 3.57 x 10(-10) mol L-1 for Tl+, 4.50 x 10(-10) mol L-1 for Pb2+ and 3.86 x 10(-10) mol L-1 for Hg2+ were achieved. Finally, the proposed electrochemical sensor was applied to detect trace analyte ions in various water and soil samples with satisfactory results. (C) 2015 Elsevier B.V. All rights reserved.

Item Type: Article
Keywords: Electrochemical sensor Chemically modified carbon paste electrode Heavy metals Graphene Simultaneous determination of heavy metals carbon-paste electrode anodic-stripping voltammetry chemically-modified electrode synthesized schiff-base langmuir-blodgett-film graphene oxide potentiometric sensor composite electrode graphite electrode biological samples Chemistry
Divisions:
Page Range: pp. 56-66
Journal or Publication Title: Analytica Chimica Acta
Journal Index: ISI
Volume: 870
Identification Number: https://doi.org/10.1016/j.aca.2015.03.004
ISSN: 0003-2670
Depositing User: مهندس مهدی شریفی
URI: http://eprints.bmsu.ac.ir/id/eprint/5486

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