Voltammetric Electronic Tongue in the Analysis of Cava Wines

Abstract

This work demonstrates the use of a voltammetric electronic tongue formed by five modified graphite-epoxy electrodes in the qualitative and quantitative analysis of cava wines. The different samples were analyzed using cyclic voltammetry without any sample pretreatment. Recorded data were evaluated by Principal Component Analysis and Discrete Wavelet Transform in order to compress and extract significant features from the voltammetric signals. The preprocessed information was evaluated by an Artificial Neural Network that accomplishes the qualitative classification. Moreover, a preliminary study related to the quantification of sugar amount present was assessed by Second-Order Standard Addition Method.

Combination of optical spectroscopy and chemometric techniques—a possible way for on-line monitoring of spent nuclear fuel (SNF) reprocessing

“…This approach is well established and widely accepted in science and industry [1][2][3][4][5]. Multivariate data processing is also widely used for atomic spectroscopy [6], UV-Vis spectroscopy [7,8], potentiometry [9,10], voltammetry [11] and for a number of other analytical methods.…”

Instrumental measurement of wine sensory descriptors using a voltammetric electronic tongue

“…Additionally, an electrochemical cleaning stage was carried out between each measurement to prevent any cumulative effect of impurities on the working electrode surfaces, and avoiding to perform any physical surface regeneration of those. To this end, a conditioning potential of +1.5 V was applied during 40 s in a cell containing 25 ml of distilled water [24]. As in the case of the panel of experts, all samples were analyzed in random order.…”

Monitoring of evolution during red wine aging in oak barrels and alternative method by means of an electronic panel test

“…The preconcentration technique is necessary to eliminate or at least diminish the concentration of water and ethanol in the volatile mixture that interferes in the response of resistive sensors (Aleixandre et al, 2008;Berna, Trowell, Clifford, Cynkar, & Cozzolino, 2009). Electronic tongues based on voltammetric, potentiometric or impedance measurements have also been used to discriminate wines with different qualities (Apetrei et al, 2007;Cetó, Gutiérrez, Moreno-Barón, Alegret, & del Valle, 2011;del Valle, 2010;Escuder-Gilabert & Peris, 2010;Gutiérrez et al, 2011;Lvova et al, 2006;Riul et al, 2004;Žeravík et al, 2009).…”