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    Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/10026

    Título
    Gel polymer electrolyte-based dual screen-printed electrodes for the headspace quantification of 4-ethylphenol and ethanethiol simultaneously in wines
    Autor
    Portugal Gómez, PaulaUBU authority Orcid
    Domínguez Renedo, OlgaUBU authority Orcid
    Alonso Lomillo, Mª AsunciónUBU authority Orcid
    Publicado en
    Microchimica Acta. 2024, V. 191, n. 4, 208
    Editorial
    Springer
    Fecha de publicación
    2024
    ISSN
    0026-3672
    DOI
    10.1007/s00604-024-06220-8
    Abstract
    The identification and correction of negative factors, such as 4-ethylphenol and ethanethiol, is important to comply with food safety regulations and avoid economic losses to wineries. A simple amperometric measurement procedure that facilitates the simultaneous quantification of both compounds in the gas phase has been developed using fullerene and cobalt (II) phthalocyanine-modified dual screen-printed electrodes coated with a room temperature ionic liquid-based gel polymer electrolyte. The replacement of the typical aqueous supporting electrolyte by low-volatility ones improves both operational and storage lifetime. Under the optimum conditions of the experimental variables, Britton Robinson buffer pH 5 and applied potentials of + 0.86 V and + 0.40 V for each working electrode (vs. Ag ref. electrode), reproducibility values of 7.6% (n = 3) for 4-ethylphenol and 6.6% (n = 3) for ethanethiol were obtained, as well as capability of detection values of 23.8 μg/L and decision limits of 1.3 μg/L and 9.2 μg/L (α = β = 0.05), respectively. These dual electrochemical devices have successfully been applied to the headspace detection of both compounds in white and red wines, showing their potential to be routinely used for rapid analysis control in wineries.
    Palabras clave
    4-Ethylphenol
    Ethanethiol
    Wine analysis
    Dual screen-printed carbon electrodes
    Gas sensor
    Gas-phase amperometry
    Room temperature ionic liquid
    Materia
    Química
    Chemistry
    Química analítica
    Chemistry, Analytic
    Alimentos
    Food
    URI
    http://hdl.handle.net/10259/10026
    Versión del editor
    https://doi.org/10.1007/s00604-024-06220-8
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    Atribución 4.0 Internacional
    Documento(s) sujeto(s) a una licencia Creative Commons Atribución 4.0 Internacional
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