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    Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/4947

    Título
    Direct determination of ascorbic acid in a grapefruit: paving the way for in vivo spectroelectrochemistry
    Autor
    Garoz Ruiz, JesúsAutoridad UBU Orcid
    Heras Vidaurre, AránzazuAutoridad UBU Orcid
    Colina Santamaría, ÁlvaroAutoridad UBU Orcid
    Publicado en
    Analytical Chemistry. 2017, V. 89, n. 3, p. 1815-1822
    Editorial
    American Chemical Society
    Fecha de publicación
    2017-02
    ISSN
    0003-2700
    DOI
    10.1021/acs.analchem.6b04155
    Resumo
    The study of real samples is more complicated than the study of other systems. However, the inherent advantages of UV–vis absorption spectroelectrochemistry should overcome some difficulties related to direct measurements in complex matrices. For this reason, a singular spectroelectrochemistry device has been fabricated and validated. The novel cell is based on single-walled carbon nanotubes, which are filtered and subsequently press-transferred on a polyethylene terephthalate support using a stencil with a custom design. With this new methodology, working, counter, and reference electrodes are completely flat on the surface, where two optical fibers are fixed in a long optical path length configuration. To demonstrate the usefulness of this device and the power of spectroelectrochemistry techniques to solve problems of the current world, this device is used to quantitatively detect the concentration of ascorbic acid in a complex matrix such as a fruit, directly, without any previous sample pretreatment. The ease to fabricate the device, the advantages related to its use, and the excellent results obtained not only with univariate but also with multivariate analysis, shed more light on the analysis of samples as they occur in nature. According to the particular features of this cell, to the best of our knowledge this is the first spectroelectrochemical sensor that can be inserted directly in a biological matrix, laying the groundwork to perform in vivo measurements in a near future.
    Materia
    Química analítica
    Chemistry, Analytic
    URI
    http://hdl.handle.net/10259/4947
    Versión del editor
    https://doi.org/10.1021/acs.analchem.6b04155
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    AnalChem2017_Pomelo.pdf
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