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).

Comprehensive explorations of nutritional, functional and potential tasty components of various types of Sufu, a Chinese fermented soybean appetizer

“…Electronic tongue (E-tongue), which comprises an array of sensors with nonselective responses to a range of inorganic and organic substances, can gather global information including sensory data and analytical properties according to the basic gustatory attributes (Dong et al, 2017). As a powerful taste sensor device, E-tongue has been widely applied to distinguish complex taste impressions contributed by tasty components (Cetó et al, 2017;Kang et al, 2014;Marx et al, 2017). However, few reports on potential tasty components and complex taste impressions for Sufu are currently available.…”

Voltammetric sensor for electrochemical determination of the floral origin of honey based on a zinc oxide nanoparticle modified carbon paste electrode

“…The sensors play a pivotal role in the performance of an electronic tongue. In the electrochemical analysis, the voltammetric technique has been regarded as the most popular technique in the complex liquid analysis because of high sensitivity, simplicity and good signal to noise ratio (Ceto et al, 2017;Wei and Wang, 2013;Apetrei and Apetrei, 2016). Voltammetric sensors as working electrodes provide information about the redox processes occurring in the solution when a potential is applied.…”

Elemental composition as a tool for the assessment of type, seasonal variability, and geographical origin of wine and its contribution to daily elemental intake

“…17 A human sensory panel can provide information about the sensory properties of wine that is far richer than can be provided by instrumental devices alone.…”