| Determination of total polyphenol index in wines employing a voltammetric electronic tongue. | |
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MedLine Citation:
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PMID: 22688049 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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This work reports the application of a voltammetric electronic tongue system (ET) made from an array of modified graphite-epoxy composites plus a gold microelectrode in the qualitative and quantitative analysis of polyphenols found in wine. Wine samples were analyzed using cyclic voltammetry without any sample pretreatment. The obtained responses were preprocessed employing discrete wavelet transform (DWT) in order to compress and extract significant features from the voltammetric signals, and the obtained approximation coefficients fed a multivariate calibration method (artificial neural network-ANN-or partial least squares-PLS-) which accomplished the quantification of total polyphenol content. External test subset samples results were compared with the ones obtained with the Folin-Ciocalteu (FC) method and UV absorbance polyphenol index (I(280)) as reference values, with highly significant correlation coefficients of 0.979 and 0.963 in the range from 50 to 2400mgL(-1) gallic acid equivalents, respectively. In a separate experiment, qualitative discrimination of different polyphenols found in wine was also assessed by principal component analysis (PCA). |
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Authors:
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Xavier Cetó; Juan Manuel Gutiérrez; Manuel Gutiérrez; Francisco Céspedes; Josefina Capdevila; Santiago Mínguez; Cecilia Jiménez-Jorquera; Manel Del Valle |
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Publication Detail:
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Type: Journal Article Date: 2012-02-22 |
Journal Detail:
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Title: Analytica chimica acta Volume: 732 ISSN: 1873-4324 ISO Abbreviation: Anal. Chim. Acta Publication Date: 2012 Jun |
Date Detail:
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Created Date: 2012-06-12 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0370534 Medline TA: Anal Chim Acta Country: Netherlands |
Other Details:
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Languages: eng Pagination: 172-9 Citation Subset: IM |
Copyright Information:
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Copyright © 2012 Elsevier B.V. All rights reserved. |
Affiliation:
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Sensors and Biosensors Group, Department of Chemistry, Universitat Autònoma de Barcelona, Edifici Cn, 08193 Bellaterra, Spain. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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