title: Portable Electronic Tongue Based on Microsensors for the Analysis of Cava Wines.
abstract: Cava is a quality sparkling wine produced in Spain. As a product with a designation of origin, Cava wine has to meet certain quality requirements throughout its production process; therefore, the analysis of several parameters is of great interest. In this work, a portable electronic tongue for the analysis of Cava wine is described. The system is comprised of compact and low-power-consumption electronic equipment and an array of microsensors formed by six ion-selective field effect transistors sensitive to pH, Na⁺, K⁺, Ca2+, Cl-, and CO₃2-, one conductivity sensor, one redox potential sensor, and two amperometric gold microelectrodes. This system, combined with chemometric tools, has been applied to the analysis of 78 Cava wine samples. Results demonstrate that the electronic tongue is able to classify the samples according to the aging time, with a percentage of correct prediction between 80% and 96%, by using linear discriminant analysis, as well as to quantify the total acidity, pH, volumetric alcoholic degree, potassium, conductivity, glycerol, and methanol parameters, with mean relative errors between 2.3% and 6.0%, by using partial least squares regressions.
authors: Instituto de Microelectrónica de Barcelona (IMB-CNM), CSIC Campus UAB, 08193 Cerdanyola del Vallès, Spain. pablo.gimenez@csic.es.
authors: Pablo
authors: P
authors: Giménez-Gómez
authors: Instituto de Microelectrónica de Barcelona (IMB-CNM), CSIC Campus UAB, 08193 Cerdanyola del Vallès, Spain. roger.escude@csic.es.
authors: Roger
authors: R
authors: Escudé-Pujol
authors: Institut Català de la Vinya i el Vi (IRTA-INCAVI), Plaça Àgora 2, 08720 Vilafranca del Penedès, Spain. finacapdevila@gmail.com.
authors: Fina
authors: F
authors: Capdevila
authors: Institut Català de la Vinya i el Vi (IRTA-INCAVI), Plaça Àgora 2, 08720 Vilafranca del Penedès, Spain. apuigpujol@gencat.cat.
authors: Anna
authors: A
authors: Puig-Pujol
authors: Instituto de Microelectrónica de Barcelona (IMB-CNM), CSIC Campus UAB, 08193 Cerdanyola del Vallès, Spain. cecilia.jimenez@csic.es.
authors: Cecilia
authors: C
authors: Jiménez-Jorquera
authors: Instituto de Microelectrónica de Barcelona (IMB-CNM), CSIC Campus UAB, 08193 Cerdanyola del Vallès, Spain. Manuel.Gutierrez@csic.es.
authors: Manuel
authors: M
authors: Gutiérrez-Capitán
mesh_terms: D002254:Carbonates / Q000032:analysis; D002712:Chlorides / Q000032:analysis; D016002:Discriminant Analysis; D055664:Electrochemical Techniques / Q000295:instrumentation / Q000379:methods*; D062609:Electronic Nose; D006046:Gold / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007477:Ions / Q000737:chemistry; D008670:Metals / Q000032:analysis; D008839:Microelectrodes; D010084:Oxidation-Reduction; D014920:Wine / Q000032:analysis*
chemical_list: D002254:Carbonates; D002712:Chlorides; D007477:Ions; D008670:Metals; D006046:Gold
keywords: Cava wine samples; electrochemical microsensors; electronic tongue; multiparametric analysis; portable equipment