Determination of Quercetin and Luteolin in Paprika Samples by Voltammetry and Partial Least Squares Calibration

Chamizo González, Francisco, Monago Maraña, Olga, Galeano Díaz, Teresa y Muñoz de la Peña, Arsenio . (2017) Determination of Quercetin and Luteolin in Paprika Samples by Voltammetry and Partial Least Squares Calibration. Journal of Agricultural and Food Chemistry

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Título Determination of Quercetin and Luteolin in Paprika Samples by Voltammetry and Partial Least Squares Calibration
Autor(es) Chamizo González, Francisco
Monago Maraña, Olga
Galeano Díaz, Teresa
Muñoz de la Peña, Arsenio
Materia(s) Ciencias
Abstract Quercetin and luteolin are flavonoids with beneficious properties, which are present in paprika. In this work, both have been determined in paprika by using electrochemistry combined with chemometrics. The electrochemical oxidation mechanisms of both analytes have been studied through sampled direct current (DC) voltammetry, differential pulse voltammetry (DPV) and Square Wave Voltammetry (SWV), making use of a glassy carbon electrode. The final technique selected for the quantification was DPV due to its high repeatability with respect SWV. The chemical variables and the instrumental parameters were optimized and the final conditions employed were ethanol: water (20 : 80), 0.75 mol dm−3 of HCl, and a pulse amplitude of 50 mV. Due to the facts that oxidation potential of both analytes were quite similar, their DPV peaks were overlapped, and also because the analytes interaction during the electrochemical process causes a non-additivity of the signals, they could not be quantified separately by direct measurement of peak intensity. For this reason, a chemometric algorithm was applied (partial least squares (PLS) regression in its modality PLS-2). In the case of validation samples, appropriate sets of calibration and validation were built and good results were obtained. This methodology was applied to real paprika samples and the results were similar to those obtained with a HPLC method previously reported.
Palabras clave Liquid chromatography
Editor(es) Wiley
Fecha 2017-09-19
Formato application/pdf
Identificador bibliuned:DptoCA-FCIE-Articulos-Omonago-0012
http://e-spacio.uned.es/fez/view/bibliuned:DptoCA-FCIE-Articulos-Omonago-0012
DOI - identifier https://doi.org/10.1002/elan.201700403
ISSN - identifier 1040-0397; eISSN 1521-4109
Nombre de la revista Electroanalysis
Número de Volumen 29
Número de Issue 12
Página inicial 2679
Página final 2924
Publicado en la Revista Journal of Agricultural and Food Chemistry
Idioma spa
Versión de la publicación acceptedVersion
Tipo de recurso Article
Derechos de acceso y licencia http://creativecommons.org/licenses/by-nc-nd/4.0
info:eu-repo/semantics/openAccess
Tipo de acceso Acceso abierto
Notas adicionales La versión registrada de este artículo, publicado por primera vez en Electroanalysis, está disponible en línea en el sitio web del editor: Wiley, https://doi.org/10.1002/elan.201700403
Notas adicionales The registered version of this paper, first published in Electroanalysis, is available online at the publisher's website: Wiley, https://doi.org/10.1002/elan.201700403

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Creado: Tue, 20 Feb 2024, 20:30:41 CET