Object's details: Dopamine modified electrodes for indirect voltammetric determination of magnesium ions

Provider:Repozytorium Uniwersytetu Łódzkiego

Description

Title:
Dopamine modified electrodes for indirect voltammetric determination of magnesium ions
Creator:
Smarzewska, Sylwia;
Mirceski, Valentin;
Koszelska, Kamila
Contributor:
University of Lodz, Faculty of Chemistry, Department of Inorganic and Analytical Chemistry, Tamka 12, 91-403 Lodz, Poland;
sylwia.smarzewska@chemia.uni.lodz.pl;
kamila.koszelska@chemia.uni.lodz.pl
Description:
This article outlines the fabrication process of an electrochemical sensor designed for the innovative determination of magnesium ions based on the electrochemistry of dopamine. The sensor operates under voltammetric conditions, accounting for variations in the electrochemical reversibility of immobilized dopamine in the presence of magnesium ions under conditions of square-wave voltammetry. The immobilization of dopamine on the glassy carbon electrode is achieved through the electrochemical oxidation of its side amino group, leading to covalent grafting onto the electrode surface. All stages of the proposed electrode surface modification procedure were carefully optimized. The dopamine sensor exhibited a linear response in the concentration range of magnesium ions from 0.1 to 10 mmol L-1, with a limit of detection (LOD) value equal to 1.3 × 10−5 mol L−1. To validate the electroanalytical significance of the developed methodology, real food supplement samples were quantitatively analyzed, demonstrating a highly satisfactory rate of recovery. The proposed voltammetric method serves as a simple and cost-effective procedure for the indirect determination of magnesium ions. Additionally, this approach allows for the analysis of real samples without the need for time-consuming preparation steps, as the complex matrices of food supplement samples did not adversely affect the registered currents.;
The research was financed by the PRELUDIUM grant of the National Science Centre (NCN) in Cracow, Poland (Grant no. 2021/41/N/ST4/ 01425).
Object availability:
free access
Date:
2025.03.19;
2024
Type:
Article
Language:
English
Format:
application/vnd.openxmlformats-officedocument.wordprocessingml.document;
application/vnd.openxmlformats-officedocument.presentationml.presentation;
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Publisher:
Elsevier
Relation:
Diamond & Related Materials;111123;
145
Subject:
Voltammetry;
Magnesium;
Dopamine;
Grafting;
Sensing
Identifier:
Kamila Koszelska, Sylwia Smarzewska, Valentin Mirceski, Dopamine modified electrodes for indirect voltammetric determination of magnesium ions, Diamond and Related Materials, Volume 145, 2024, 111123, ISSN 0925-9635, https://doi.org/10.1016/j.diamond.2024.111123.;
0925-9635;
http://hdl.handle.net/11089/55038 ;
10.1016/j.diamond.2024.111123
Data provider:
Repozytorium Uniwersytetu Łódzkiego

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