Electrochemical determination of Roxarsone using preconcentration-based signal amplification on modified screen-printed electrode.

Autor: Ferreira LMC; Center of Nature Sciences, Federal University of São Carlos, Rod. Lauri Simões de Barros km 12, 18290-000 Buri, SP, Brazil; Laboratory of Electrochemical Sensors (LabSensE) - Department of Chemistry, Federal University of Paraná, 81.531-980, Curitiba, PR, Brazil., Martins PR; Institute of Chemistry, Federal University of Goiás, Av. Esperança, Goiania, GO 74690-900, Brazil., Silva CG; Institute of Chemistry, Federal University of Goiás, Av. Esperança, Goiania, GO 74690-900, Brazil., Marcolino-Junior LH; Laboratory of Electrochemical Sensors (LabSensE) - Department of Chemistry, Federal University of Paraná, 81.531-980, Curitiba, PR, Brazil., Bergamini MF; Laboratory of Electrochemical Sensors (LabSensE) - Department of Chemistry, Federal University of Paraná, 81.531-980, Curitiba, PR, Brazil., Vicentini FC; Center of Nature Sciences, Federal University of São Carlos, Rod. Lauri Simões de Barros km 12, 18290-000 Buri, SP, Brazil. Electronic address: fcvicentini@ufscar.br.
Jazyk: angličtina
Zdroj: Food chemistry [Food Chem] 2023 Oct 09; Vol. 437 (Pt 1), pp. 137698. Date of Electronic Publication: 2023 Oct 09.
DOI: 10.1016/j.foodchem.2023.137698
Abstrakt: A lab-made screen-printed electrode based on poly(ethylene terephthalate) (PET) substrate modified with a hybrid film containing gold nanoparticles-decorated graphene (AuNPs-GRA/PET-SPE) was employed for the voltammetric determination of Roxarsone (ROX) in chicken purge and river water samples. The electrode exhibited an increased electroactive area and enhanced charge transfer due to the nanostructured matrix. The electrochemical determination involved a preconcentration approach with a reduction step of ROX at a constant potential of -0.6 V, followed by voltammetric sweep towards the oxidation of the adsorbed hydroxylamine at 0.32 V. The methodology achieved a limit of detection of 60 nM and 97 nM for ROX in diluted river water and chicken purge samples, respectively. This effective methodology offers a promising tool for monitoring ROX levels in environmental and food samples.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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