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Polymers
Volume 15
Issue 3
10.3390/polym15030739
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Communication

PEDOT: PSS/AuNPs-Based Composite as Voltammetric Sensor for the Detection of Pirimicarb

by
Andrei E. Deller
1,†,
Bruna M. Hryniewicz
1,†,
Camila Pesqueira
1,
Rayta Paim Horta
2,
Bruno José Gonçalves da Silva
2,
Saddam Weheabby
3,
Ammar Al-Hamry
3,
Olfa Kanoun
3 and
Marcio Vidotti
1,*
1
Grupo de Pesquisa em Macromoléculas e Interfaces, Universidade Federal do Paraná (UFPR), Curitiba 81531-980, PR, Brazil
2
Grupo de Cromatografia e Técnicas de Microextração, Departamento de Química, Universidade Federal do Paraná–UFPR, C.P. 19032, Curitiba 81531-980, PR, Brazil
3
Measurement and Sensor Technology, Chemnitz University of Technology, 09126 Chemnitz, Germany
*
Author to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Polymers 2023, 15(3), 739; https://doi.org/10.3390/polym15030739
Submission received: 19 December 2022 / Revised: 27 January 2023 / Accepted: 28 January 2023 / Published: 31 January 2023
(This article belongs to the Special Issue Polymer-Based Materials for Sensors)
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Abstract

An electrochemical sensor for the pesticide Pirimicarb (PMC) has been developed. A screen-printed electrode (SPCE) was used and modified with the conducting polymer poly (3,4-ethylenedioxythiophene) (PEDOT) and gold nanoparticles (AuNPs) to enhance electrochemical proprieties. Electrode characterizations were performed using scattering electron microscopy (SEM) and cyclic voltammetry (CV). With the SPCE/PEDOT:PSS/AuNPs modified electrode, a new peak at 1.0 V appeared in the presence of PMC related to the PMC oxidation. To elucidate the mechanism of PMC oxidation, Gas Chromatography-Mass Spectrometry (GC-MS), where two major peaks were identified, evidencing that the device can both detect and degrade PMC by an electro-oxidation process. Exploring this peak signal, it was possible the sensor development, performing detection from 93.81–750 µmol L−1, limits of quantification (LOQ) and detection (LOD) of 93.91 µmol L−1 and 28.34 µmol L−1, respectively. Thus, it was possible to study and optimization of PMC degradation, moreover, to perform detection at low concentrations and with good selectivity against different interferents using a low-cost printed electrode based on graphite modified with conductive polymer and AuNPs.
Keywords: pirimicarb; electrochemical sensor; modified electrode; conductive polymers; composites; PEDOT:PSS pirimicarb; electrochemical sensor; modified electrode; conductive polymers; composites; PEDOT:PSS

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MDPI and ACS Style

Deller, A.E.; Hryniewicz, B.M.; Pesqueira, C.; Horta, R.P.; da Silva, B.J.G.; Weheabby, S.; Al-Hamry, A.; Kanoun, O.; Vidotti, M. PEDOT: PSS/AuNPs-Based Composite as Voltammetric Sensor for the Detection of Pirimicarb. Polymers 2023, 15, 739. https://doi.org/10.3390/polym15030739

AMA Style

Deller AE, Hryniewicz BM, Pesqueira C, Horta RP, da Silva BJG, Weheabby S, Al-Hamry A, Kanoun O, Vidotti M. PEDOT: PSS/AuNPs-Based Composite as Voltammetric Sensor for the Detection of Pirimicarb. Polymers. 2023; 15(3):739. https://doi.org/10.3390/polym15030739

Chicago/Turabian Style

Deller, Andrei E., Bruna M. Hryniewicz, Camila Pesqueira, Rayta Paim Horta, Bruno José Gonçalves da Silva, Saddam Weheabby, Ammar Al-Hamry, Olfa Kanoun, and Marcio Vidotti. 2023. "PEDOT: PSS/AuNPs-Based Composite as Voltammetric Sensor for the Detection of Pirimicarb" Polymers 15, no. 3: 739. https://doi.org/10.3390/polym15030739

APA Style

Deller, A. E., Hryniewicz, B. M., Pesqueira, C., Horta, R. P., da Silva, B. J. G., Weheabby, S., Al-Hamry, A., Kanoun, O., & Vidotti, M. (2023). PEDOT: PSS/AuNPs-Based Composite as Voltammetric Sensor for the Detection of Pirimicarb. Polymers, 15(3), 739. https://doi.org/10.3390/polym15030739

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