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    Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/4378

    Título
    Effect of Nanoparticles on Modified Screen Printed Inhibition Superoxide Dismutase Electrodes for Aluminum
    Autor
    Barquero Quirós, Miriam
    Arcos Martínez, JuliaAutoridad UBU Orcid
    Publicado en
    Sensors, 2016, V. 16, n. 10, art. 1588
    Editorial
    MDPI
    Fecha de publicación
    2016-10
    ISSN
    1424-8220
    Resumen
    A novel amperometric biosensor for the determination of Al(III) based on the inhibition of the enzyme superoxide dismutase has been developed. The oxidation signal of epinephrine substrate was affected by the presence of Al(III) ions leading to a decrease in its amperometric current. The immobilization of the enzyme was performed with glutaraldehyde on screen-printed carbon electrodes modifiedwith tetrathiofulvalene (TTF) and different types ofnanoparticles. Nanoparticles of gold, platinum, rhodium and palladium were deposited on screen printed carbon electrodes by means of two electrochemical procedures. Nanoparticles were characterized trough scanning electronic microscopy, X-rays fluorescence, and atomic force microscopy. Palladium nanoparticles showed lower atomic force microscopy parameters and higher slope of aluminum calibration curves and were selected to perform sensor validation. The developed biosensor has a detection limit of 2.0 0.2 Mfor Al(III), with a reproducibility of 7.9% (n = 5). Recovery of standard reference material spiked to buffer solution was 103.8% with a relative standard deviation of 4.8% (n = 5). Recovery of tap water spiked with the standard reference material was 100.5 with a relative standard deviation of 3.4% (n = 3). The study of interfering ions has also been carried out.
    Palabras clave
    superoxide dismutase biosensor
    aluminum
    tetrathiofulvalene
    screen-printed electrodes
    nanoparticles
    Materia
    Chemistry, Analytic
    Química analítica
    URI
    http://hdl.handle.net/10259/4378
    Versión del editor
    http://dx.doi.org/10.3390/s16101588
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    • Artículos ELAN
    Attribution 4.0 International
    Documento(s) sujeto(s) a una licencia Creative Commons Attribution 4.0 International
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    Nombre:
    Barquero-Sensors_2016.pdf
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    2.378Mb
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