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    Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/5337

    Título
    Electrochemical SERS and SOERS in a single experiment: A new methodology for quantitative analysis
    Autor
    Hernández Muñoz, SheilaUBU authority Orcid
    Perales Rondon, Juan VíctorUBU authority Orcid
    Heras Vidaurre, AránzazuUBU authority Orcid
    Colina Santamaría, ÁlvaroUBU authority Orcid
    Publicado en
    Electrochimica Acta. 2020, V. 334, 135561
    Editorial
    Elsevier
    Fecha de publicación
    2020-02
    ISSN
    0013-4686
    DOI
    10.1016/j.electacta.2019.135561
    Abstract
    In the present work, a new methodology which combines two different phenomena to enhance the Raman signal is used to resolve a mixture of two compounds with similar molecular structures. The use of Raman spectroelectrochemistry (Raman-SEC) allows us to collect simultaneously, with high time-resolution, the enhancement of the Raman signal of the compounds present in a sample during the electrochemical oxidation-reduction cycle (ORC) of a silver screen-printed electrode. During such ORC two different phenomena appears depending on the stage of the electrochemical modification of the silver substrate, which are known as electrochemical surface enhanced Raman scattering (EC-SERS) and electrochemical surface oxidation enhanced Raman scattering (EC-SOERS). This work is a proof of concept that demonstrates the advantage of using EC-SOERS and EC-SERS in a single experiment to resolve mixtures of similar molecules such as vitamin B3, which components are nicotinic acid and nicotinamide. Although the interaction between analytes and substrates influence a univariate calibration, the trilinear character of Raman-SEC makes possible to deconvolve such interactions and provide a good calibration curve for both, nicotinic acid and nicotinamide.
    Palabras clave
    EC-SERS
    EC-SOERS
    Raman spectroelectrochemistry
    Nicotinic acid
    Nicotinamide
    Materia
    Química analítica
    Chemistry, Analytic
    URI
    http://hdl.handle.net/10259/5337
    Versión del editor
    https://doi.org/10.1016/j.electacta.2019.135561
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