title: Electronic tongues to assess wine sensory descriptors.
abstract: This work reports the application of an electronic tongue as a tool towards the analysis of wine in tasks such as its discrimination based on the maturing in barrels or the prediction of the global scores assigned by a sensory panel. To this aim, red wine samples were first analysed with the voltammetric sensor array, without performing any sample pretreatment. Afterwards, obtained responses were preprocessed employing fast Fourier transform (FFT) for the compression and reduction of signal complexity, and obtained coefficients were then used as inputs to build the qualitative and quantitative models employing either linear discriminant analysis (LDA) or partial least squares regression (PLS), respectively. Satisfactory results were obtained overall, with a classification rate of 100% in the discrimination of the type of barrel used during wine maturing, a normalized NRMSE of 0.077 in the estimation of ageing time (months) or 0.11 in the prediction of the scores (0-10) from a trained sensory panel (all for the external test subset).
authors.affiliation: Future Industries Institute, University of South Australia, 5095 Adelaide, Australia.
authors.forename: Xavier
authors.initials: X
authors.lastname: Cetó
authors.affiliation: Sensors and Biosensors Group, Department of Chemistry, Universitat Autònoma de Barcelona, Edifici Cn, 08193 Bellaterra, Barcelona, Spain.
authors.forename: Andreu
authors.initials: A
authors.lastname: González-Calabuig
authors.affiliation: Sensors and Biosensors Group, Department of Chemistry, Universitat Autònoma de Barcelona, Edifici Cn, 08193 Bellaterra, Barcelona, Spain.
authors.forename: Nora
authors.initials: N
authors.lastname: Crespo
authors.affiliation: Future Industries Institute, University of South Australia, 5095 Adelaide, Australia; Sensors and Biosensors Group, Department of Chemistry, Universitat Autònoma de Barcelona, Edifici Cn, 08193 Bellaterra, Barcelona, Spain.
authors.forename: Sandra
authors.initials: S
authors.lastname: Pérez
authors.affiliation: Estació de Viticultura i Enologia, INCAVI-IRTA, 08720 Vilafranca del Penedès, Spain.
authors.forename: Josefina
authors.initials: J
authors.lastname: Capdevila
authors.affiliation: Estació de Viticultura i Enologia, INCAVI-IRTA, 08720 Vilafranca del Penedès, Spain.
authors.forename: Anna
authors.initials: A
authors.lastname: Puig-Pujol
authors.affiliation: Sensors and Biosensors Group, Department of Chemistry, Universitat Autònoma de Barcelona, Edifici Cn, 08193 Bellaterra, Barcelona, Spain. Electronic address: manel.delvalle@uab.cat.
authors.forename: M Del
authors.initials: MD
authors.lastname: Valle
keywords: Ageing; Electronic tongue; Partial least squares regression; Sensory panel; Voltammetric sensors; Wine