RT info:eu-repo/semantics/article
T1 Monitoring the phenolic ripening of red grapes using a multisensor system based on metal-oxide nanoparticles
A1 García Hernández, Celia
A1 Medina Plaza, Cristina
A1 García Cabezón, Ana Cristina
A1 Blanco Val, María Yolanda
A1 Fernández Escudero, José Antonio
A1 Barajas Tola, Enrique
A1 Rodríguez Pérez, Miguel Ángel
A1 Martín Pedrosa, Fernando
A1 Rodríguez Méndez, María Luz
K1 Electronic tongue
K1 Lengua electrónica
K1 Phenolic maturity
K1 Maduración fenólica
K1 Grapes
K1 Uvas
K1 2303 Química Inorgánica
AB The maturity of grapes is usually monitored by means of the sugar concentration.However, the assessment of other parameters such as the phenolic content is alsoimportant because the phenolic maturity has an important impact on the organolepticcharacteristics of wines. In this work, voltammetric sensors able to detect phenolsin red grapes have been developed. They are based on metal oxide nanoparticles(CeO2, NiO, and TiO2,) whose excellent electrocatalytic properties toward phenolsallows obtaining sensors with detection limits in the range of 10−8 M and coefficientsof variation lower than 7%. An electronic tongue constructed using a combination of thenanoparticle-based sensors is capable to monitor the phenolic maturity of red grapesfrom véraison to maturity. Principal Component Analysis (PCA) can be successfully usedto discriminate samples according to the ripeness. Regression models performed usingPartial Least Squares (PLS-1) have established good correlations between voltammetricdata obtained with the electrochemical sensors and the Total Polyphenolic Index, theBrix degree and the Total Acidity, with correlation coefficients close to 1 and low numberof latent variables. An advantage of this system is that the electronic tongue can be usedfor the simultaneous assessment of these three parameters which are the main factorsused to monitor the maturity of grapes. Thus the electronic tongue based on metal oxidenanoparticles can be a valuable tool to monitor ripeness. These results demonstratethe exciting possible applications of metal oxide nanoparticles in the field of electronictongues.
PB Frontiers
SN 2296-2646
YR 2018
FD 2018
LK http://uvadoc.uva.es/handle/10324/40958
UL http://uvadoc.uva.es/handle/10324/40958
LA eng
NO Frontiers in Chemistry, 2018, vol. 6. 8 p.
NO Producción Científica
DS UVaDOC
RD 23-nov-2024