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γ-Cyclodextrin-graphene quantum dots-chitosan modified screen-printed electrode for sensing of fluoroquinolones

Identificadores del recurso

http://hdl.handle.net/10396/27052

Procedència

(Helvia: Repositorio Institucional de la Universidad de Córdoba)

Fitxa

Títol:: γ-Cyclodextrin-graphene quantum dots-chitosan modified screen-printed electrode for sensing of fluoroquinolones
Tema:: Voltammetric approach; Bionanocomposite assembly; Graphenic nanostructure; Animal-source foods; Host– guest receptors
Descripció:: An innovative electrochemical approach based on screen-printed carbon electrodes (SPCEs) modified with graphene quantum dots (GQDs) functionalized with γ-cyclodextrin (γ-CD) and assembled to chitosan (CHI) is designed for the assessment of the total content of fluoroquinolones (FQs) in animal source products. For the design of the bionanocomposite, carboxylated graphene quantum dots synthesized from uric acid as precursor were functionalized with γ-CD using succinic acid as a linker. Physic-chemical and nanostructural characterization of the ensuing nanoparticles was performed by high-resolution transmission scanning microscopy, dynamic light scattering, Z potential measurement, Fourier transformed infrared spectroscopy and X-ray diffraction. Electrochemical properties of assembled bionanocomposite like potential difference, kinetic electronic transfer constant and electroactive area among other parameters were assessed by cyclic voltammetry and differential pulse voltammetry using potassium ferricyanide as redox probe. The oxidation behaviour of four representative quinolones with distinctive structures was studied, obtaining in all cases the same number of involved e− (2) and H+ (2) in their oxidation. These results led us to propose a single and consistent oxidation mechanism for all the checked analytes. The γ-CD-GQDs-CHI/SPCE sensor displayed a boosted electroanalytical performance in terms of linear range (4–250 µM), sensibility (LOD = 1.2 µM) and selectivity. This electrochemical strategy allowed the determination of FQs total amount in complex processed food like broths, bouillon cubes and milkshakes at three concentration levels (150, 75 and 37.5 µM) for both equimolar and different ratio FQs mixtures with recovery values ranging from 90 to 106%.
Font:: Bartolomé, M., Soriano, M.L., Villaseñor, M.J. et al. γ-Cyclodextrin-graphene quantum dots-chitosan modified screen-printed electrode for sensing of fluoroquinolones. Microchim Acta 190, 60 (2023). https://doi.org/10.1007/s00604-023-05646-w
Idioma:: English
Relació:: doi.org/10.1007/s00604-023-05646-w; Gobierno de España. PID2019-104381GB-100; Gobierno de España. SBPLY/21/180501/000188
Autor/Productor:: Bartolomé, Manuel; Soriano, M. Laura; Villaseñor, M. Jesús; Ríos, Ángel
Editor:: Springer
Drets:: https://creativecommons.org/licenses/by/4.0/; info:eu-repo/semantics/openAccess
Data:: 2024-02-04T17:58:32Z; 2023
Tipo de recurso:: info:eu-repo/semantics/article
Format:: application/pdf

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