Evaluation of red wines antioxidant capacity by means of a voltammetric e-tongue with an optimized sensor array
Cetó Alsedà, Xavier (Universitat Autònoma de Barcelona. Departament de Química)
Apetrei, Constantin (Universitatea Dunărea de Jos. Departamentul de Chimie, Fizică și Mediu)
Valle Zafra, Manuel del (Universitat Autònoma de Barcelona. Departament de Química)
Rodríguez-Méndez, Maria Luz (Universidad de Valladolid. Departamento de Química Inorgánica)

Date:	2014
Abstract:	In this work, two sets of voltammetric sensors -prepared using different strategies- have been combined in an electronic tongue to evaluate the complete antioxidant profile of red wines. To this aim, wine samples were analyzed with the whole set of sensors. In order to reduce the large dimensionality of the data set while keeping the relevant information provided by the sensors, two different methods of feature selection and data compression were used (the kernels method and Discrete Wavelet Transform feature extraction method). Then, the coefficients obtained were used as the input variables of Principal Component Analysis (to evaluate the capability of discrimination. Partial-least squares regression (PLS) and artificial neural networks (ANNs) were performer to build the quantitative prediction models that allowed the quantification of the antioxidant capacity of the tested wines.
Grants:	Ministerio de Ciencia e Innovación CTQ2010-17099 Ministerio de Ciencia e Innovación AGL2009-12660/ALI
Note:	Altres ajuts: financial support for this work was provided by the program ICREA Academia. X. Cetó thanks the support of Dept. d'Innovació, Universitats i Empresa de la Generalitat de Catalunya for the predoctoral grant.
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Subject:	Antioxidants ; Electronic tongue ; Polyphenols ; Voltammetric sensors ; Wine
Published in:	Electrochimica acta, Vol. 120 (Feb. 2014) , p. 180-186, ISSN 1873-3859

DOI: 10.1016/j.electacta.2013.12.079

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