Voltammetric electronic tongue to identify Brett character in wines. On-site quantification of its ethylphenol metabolites
González-Calabuig, Andreu (Universitat Autònoma de Barcelona. Departament de Química)
Valle Zafra, Manuel del (Universitat Autònoma de Barcelona. Departament de Química)
Fecha: |
2018 |
Resumen: |
This work reports the applicability of a voltammetric sensor array able to evaluate the content of the metabolites of the Brett defect: 4-ethylphenol, 4-ethylguaiacol and 4-ethylcatechol in spiked wine samples using the electronic tongue (ET) principles. The ET used cyclic voltammetry signals, obtained from an array of six graphite epoxy modified composite electrodes; these were compressed using Discrete Wavelet transform while chemometric tools, among these artificial neural networks (ANNs), were employed to build the quantitative prediction model. In this manner, a set of standards based on a modified full factorial design and ranging from 0 to 25 mg L−1 on each phenol, was prepared to build the model; afterwards, the model was validated with an external test set. The model successfully predicted the concentration of the three considered phenols with a normalized root mean square error of 0. 02 and 0. 05, for the training and test subsets respectively, and correlation coefficients better than 0. 958. |
Ayudas: |
Ministerio de Economía y Competitividad CTQ2013-41577-P
|
Nota: |
Altres ajuts: Andreu González-Calabuig thanks Universtitat Autònoma de Barcelona for the PIF fellowship. Manel del Valle thanks the support from program ICREA Academia. |
Derechos: |
Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. |
Lengua: |
Anglès |
Documento: |
Article ; recerca ; Versió sotmesa a revisió |
Materia: |
Artificial neural networks ;
Brettanomyces defect ;
Electronic tongue ;
Phenolic defects ;
Wine |
Publicado en: |
Talanta, Vol. 179 (March 2018) , p. 70-74, ISSN 1873-3573 |
DOI: 10.1016/j.talanta.2017.10.041
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