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Chemistry in Industry : Journal of Chemists and Chemical Engineers of Croatia, Vol. 71 No. 3-4, 2022.

Original scientific paper

https://doi.org/10.15255/KUI.2021.046

Electrochemical Detection of Lead Ions by 2-Benzimidazolethiol-modified Carbon Paste Electrode Prepared by Inset Modification: A Voltammetric Study

Sakina Touzara ; Molecular Electrochemistry and Inorganic Materials Team, Faculty of Science and Technology of Beni Mellal, University of Sultan Moulay Slimane, Marocco
Jihane El Mastour ; Molecular Electrochemistry and Inorganic Materials Team, Faculty of Science and Technology of Beni Mellal, University of Sultan Moulay Slimane, Marocco
Amina Amlil ; Molecular Electrochemistry and Inorganic Materials Team, Faculty of Science and Technology of Beni Mellal, University of Sultan Moulay Slimane, Marocco
Abdelilah Chtaini ; Molecular Electrochemistry and Inorganic Materials Team, Faculty of Science and Technology of Beni Mellal, University of Sultan Moulay Slimane, Marocco

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Abstract

In this work, an electrochemical sensor was prepared by modifying a carbon paste with the organic molecule of 2-benzimidazolethiol (CPE/OM) by mixing methods (by combination of the organic molecules and the carbon electrode). The sensor was tested for detection of lead ions in an aqueous solution. All reactions studied took place on the modified electrode surface, the place of contact between the electrode and the electrolytic medium. For this reason, the electrochemical properties of the CPE/OM, including cyclic voltammetry and square wave voltammetry techniques, were used. Cyclic voltammetry studies have indicated the reaction involved. The determination of lead was carried out utilising the voltammetric technique at the surface of the modified electrode, and the correlation between the current of peak oxidation and the concentration of this ion showed a detection limit (DL) of 3.43 ∙ 10–6 mol l–1. The experimental results proved that the carbon paste electrode modified with 2-benzimidazolethiol had high sensitivity toward lead ions and a wide linearity range.




This work is licensed under a Creative Commons Attribution 4.0 International License.

Keywords

cyclic voltammetry; heavy metals; organic molecule; sensor; modified electrode

Hrčak ID:

274078

URI

https://hrcak.srce.hr/274078

Publication date:

16.3.2022.

Article data in other languages: croatian

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