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    Por favor, use este identificador para citar o enlazar este ítem:http://uvadoc.uva.es/handle/10324/21093

    Título
    Discrimination of Apple Liqueurs (Nalewka) Using a Voltammetric Electronic Tongue, UV-Vis and Raman Spectroscopy
    Autor
    Sliwinska Bartkowiak, Malgorzata
    García Hernández, Celiauntranslated
    Koscinski, Micolaj
    Dymerski, Tomasz
    Wardencki, Waldemar
    Namiesnik, Jacek
    Sliwinska Bartkowiak, Malgorzata
    Jurga, Stefan
    García Cabezón, Ana Cristinauntranslated ORCID
    Rodríguez Méndez, María Luzuntranslated ORCID
    Año del Documento
    2016
    Editorial
    MDPI
    Descripción
    Producción Científica
    Documento Fuente
    Sensors, Octubre 2016, vol. 16, p. 1-14
    Abstract
    The capability of a phthalocyanine-based voltammetric electronic tongue to analyze strong alcoholic beverages has been evaluated and compared with the performance of spectroscopic techniques coupled to chemometrics. Nalewka Polish liqueurs prepared from five apple varieties have been used as a model of strong liqueurs. Principal Component Analysis has demonstrated that the best discrimination between liqueurs prepared from different apple varieties is achieved using the e-tongue and UV-Vis spectroscopy. Raman spectra coupled to chemometrics have not been efficient in discriminating liqueurs. The calculated Euclidean distances and the k Nearest Neighbors algorithm (kNN) confirmed these results. The main advantage of the e-tongue is that, using PLS-1, good correlations have been found simultaneously with the phenolic content measured by the Folin–Ciocalteu method (R2 of 0.97 in calibration and R2 of 0.93 in validation) and also with the density, a marker of the alcoholic content method (R2 of 0.93 in calibration and R2 of 0.88 in validation). UV-Vis coupled with chemometrics has shown good correlations only with the phenolic content (R2 of 0.99 in calibration and R2 of 0.99 in validation) but correlations with the alcoholic content were low. Raman coupled with chemometrics has shown good correlations only with density (R2 of 0.96 in calibration and R2 of 0.85 in validation). In summary, from the three holistic methods evaluated to analyze strong alcoholic liqueurs, the voltammetric electronic tongue using phthalocyanines as sensing elements is superior to Raman or UV-Vis techniques because it shows an excellent discrimination capability and remarkable correlations with both antioxidant capacity and alcoholic content—the most important parameters to be measured in this type of liqueurs.
    Materias (normalizadas)
    Electronic tongue
    Voltammetric sensor
    UV-Vis
    Raman spectroscopy
    Apple liqueurs
    nalewka
    ISSN
    1424-8220
    Revisión por pares
    SI
    DOI
    10.3390/s16101654
    Patrocinador
    MS agradece a los Fondos Sociales Europeos (POKL.04.01.01-00-368/09) y (POKL04.03.00-00-238/12) por la financiación. CG-H agradece a la JCyL por su contrato pre-doctoral (BOCYL-D-24112015-9).
    Ministerio de Economía, Industria y Competitividad – FEDER (AGL2015-67482-R)
    Junta de Castilla y León (programa de apoyo a proyectos de investigación - Ref. VA-032U13)
    Version del Editor
    http://www.mdpi.com/1424-8220/16/10/1654
    Idioma
    eng
    URI
    http://uvadoc.uva.es/handle/10324/21093
    Derechos
    openAccess
    Collections
    • DEP63 - Artículos de revista [188]
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