RT info:eu-repo/semantics/article
T1 An Electrochemical Quartz Crystal Microbalance Multisensor System Based on Phthalocyanine Nanostructured Films: Discrimination of Musts
A1 García Hernández, Celia
A1 Medina Plaza, Cristina
A1 García Cabezón, Ana Cristina
A1 Martín Pedrosa, Fernando
A1 Valle González, María Isabel del
A1 Saja Sáez, José Antonio de
A1 Rodríguez Méndez, María Luz
K1 LbL
K1 EQCM
K1 phthalocyanine
K1 must
K1 grapes
K1 electronic tongue
AB An array of electrochemical quartz crystal electrodes (EQCM) modified with nanostructured films based on phthalocyanines was developed and used to discriminate musts prepared from different varieties of grapes. Nanostructured films of iron, nickel and copper phthalocyanines were deposited on Pt/quartz crystals through the Layer by Layer technique by alternating layers of the corresponding phthalocyanine and poly-allylamine hydrochloride. Simultaneous electrochemical and mass measurements were used to study the mass changes accompanying the oxidation of electroactive species present in must samples obtained from six Spanish varieties of grapes (Juan García, Prieto Picudo, Mencía Regadío, Cabernet Sauvignon, Garnacha and Tempranillo). The mass and voltammetric outputs were processed using three-way models. Parallel Factor Analysis (PARAFAC) was successfully used to discriminate the must samples according to their variety. Multi-way partial least squares (N-PLS) evidenced the correlations existing between the voltammetric data and the polyphenolic content measured by chemical methods. Similarly, N-PLS showed a correlation between mass outputs and parameters related to the sugar content. These results demonstrated that electronic tongues based on arrays of EQCM sensors can offer advantages over arrays of mass or voltammetric sensors used separately.
PB MDPI
SN 1424-8220
YR 2015
FD 2015
LK http://uvadoc.uva.es/handle/10324/21108
UL http://uvadoc.uva.es/handle/10324/21108
LA eng
NO Sensors, November 2015, vol. 15, n. 11, p. 29233-29249
NO Producción Científica
DS UVaDOC
RD 25-abr-2024