RT info:eu-repo/semantics/article
T1 Analysis of phenolic content in grape seeds and skins by means of a bio-electronic tongue
A1 Gobbi Teixeira, Guilherme
A1 Guimarães Dias, Luís
A1 Salvo Comino, Coral
A1 García Hernández, Celia
A1 Rodríguez Méndez, María Luz
A1 Martín Pedrosa, Fernando
K1 Electrochemical sensor
K1 Bio-electronic tongue
K1 Grape seeds
K1 Grape skin
K1 Phenol
K1 22 Física
K1 23 Química
AB A bio-electronic tongue has been developed to evaluate the phenolic content of grape residues (seeds and skins) in a fast and easy way with industrial use in mind. A voltammetric electronic tongue has been designed based on carbon resin electrodes modified with tyrosinase combined with electron mediators. The presence of the phenoloxydase promotes the selectivity and specificity towards phenols. The results of multivariate analysis allowed discriminating seeds and skins according to their polyphenolic content. Partial least squares (PLS) has been used to establish regression models with parameters related to phenolic content measured by spectroscopic methods i.e., total poliphenol content (TPC) and Folin–Ciocalteu (FC) indexes. It has been shown that electronic tongue can be successfully used to predict parameters of interest with high correlation coefficients (higher than 0.99 in both calibration and prediction) and low residual errors. These values can even be improved using genetic algorithms for multivalent analysis. In this way, a fast and simple tool is available for the evaluation of these values. This advantage may be due to the fact that the electrochemical signals are directly related to the phenolic content.
PB MDPI
SN 1424-8220
YR 2020
FD 2020
LK https://uvadoc.uva.es/handle/10324/49163
UL https://uvadoc.uva.es/handle/10324/49163
LA eng
NO Sensors, 2020, vol. 20, n. 15, 4176
NO Producción Científica
DS UVaDOC
RD 26-abr-2024