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Qian L, Sridhar D, Shi T, van der Zalm J, Thiruppathi AR, Guerreiro MC, Chen A. Sensitive electrochemical detection of methimazole based on a unique copper and exfoliated graphene oxide nanocomposite. CHEMOSPHERE 2024; 365:143343. [PMID: 39278330 DOI: 10.1016/j.chemosphere.2024.143343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Revised: 08/10/2024] [Accepted: 09/12/2024] [Indexed: 09/18/2024]
Abstract
Herein, we report the creation of a novel sensitive electrochemical sensing platform based on a copper and exfoliated graphene oxide (Cu-eGO) nanocomposite using a facile synthesis technique, which simultaneously removes the sodium ions that result from the exfoliation process to generate eGO from graphite. This novel Cu-eGO nanocomposite was characterized via SEM, EDX, Raman and XPS. The Cu-eGO/GCE exhibited much greater activity for the electrochemical oxidation of methimazole than the eGO/GCE or bare GCE. The electrochemical properties and kinetics involved in the oxidation of methimazole at the Cu-eGO were examined using voltammetry and electrochemical impedance spectroscopy (EIS). This Cu-eGO based sensing platform demonstrated high sensitivity at 1.32 μAμM-1cm-2, a low limit of detection at 0.06 μM, robust stability, and strong anti-interference against potential interferents that may exist in biological systems for the detection of methimazole. The developed electrochemical sensor was successfully employed in blood serum samples that mimicked real biological environments, showing its high applicability.
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Affiliation(s)
- Lanting Qian
- Electrochemical Technology Centre, Department of Chemistry, University of Guelph, 50 Stone Rd E, Guelph, Ontario, N1G,2W1 Canada
| | - Deepak Sridhar
- Electrochemical Technology Centre, Department of Chemistry, University of Guelph, 50 Stone Rd E, Guelph, Ontario, N1G,2W1 Canada
| | - Tony Shi
- Electrochemical Technology Centre, Department of Chemistry, University of Guelph, 50 Stone Rd E, Guelph, Ontario, N1G,2W1 Canada
| | - Joshua van der Zalm
- Electrochemical Technology Centre, Department of Chemistry, University of Guelph, 50 Stone Rd E, Guelph, Ontario, N1G,2W1 Canada
| | - Antony R Thiruppathi
- Electrochemical Technology Centre, Department of Chemistry, University of Guelph, 50 Stone Rd E, Guelph, Ontario, N1G,2W1 Canada
| | - Mario C Guerreiro
- Department of Chemistry, Institute of Natural Sciences, Federal University of Lavras, P.O. Box 3037, Lavras, MG, 37200-900, Brazil
| | - Aicheng Chen
- Electrochemical Technology Centre, Department of Chemistry, University of Guelph, 50 Stone Rd E, Guelph, Ontario, N1G,2W1 Canada.
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Qian L, van Riesen A, van der Zalm J, Manderville R, Chen A. Design and Electrochemical Study of Merocyanine Dyes: Influence of Substituents on the Redox Behaviors and Fouling Propensity at Ubiquitous Electrode Surfaces. J Electroanal Chem (Lausanne) 2023. [DOI: 10.1016/j.jelechem.2023.117415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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Durairaj S, Guo Q, Wang Q, Chen A. Sensitive electrochemical detection of metabisulphite in gastrointestinal fluids. Analyst 2022; 147:5508-5517. [DOI: 10.1039/d2an01352e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Electrochemical detection of metabisulphite in simulated gastrointestinal fluids.
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Affiliation(s)
- Sharmila Durairaj
- Electrochemical Technology Centre, Department of Chemistry, University of Guelph, 50 Stone Road East, Guelph, ON N1G2W1, Canada
| | - Qian Guo
- Agriculture and Agri-Food Canada, 90 Stone Road West, Guelph, ON N1G 5C9, Canada
| | - Qi Wang
- Agriculture and Agri-Food Canada, 90 Stone Road West, Guelph, ON N1G 5C9, Canada
| | - Aicheng Chen
- Electrochemical Technology Centre, Department of Chemistry, University of Guelph, 50 Stone Road East, Guelph, ON N1G2W1, Canada
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