RT info:eu-repo/semantics/article
T1 Discrimination of apple liqueurs (nalewka) using a voltammetric electronic tongue, UV-Vis and Raman spectroscopy
A1 Sliwinska, Magdalena
A1 García Hernández, Celia
A1 Kościński, Mikołaj
A1 Dymerski, Tomasz
A1 Wardencki, Waldemar
A1 Namiesnik, Jacek
A1 Sliwinska Bartkowiak, Malgorzata
A1 Jurga, Stefan
A1 García Cabezón, Ana Cristina
A1 Rodríguez Méndez, María Luz
K1 Electronic tongue
K1 Lengua electrónica
K1 Voltammetric sensors
K1 Sensores voltamétricos
K1 UV-Vis spectroscopy
K1 Espectroscopía UV-Vis
K1 Raman spectroscopy
K1 Espectroscopia Raman
AB 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.
PB MDPI
SN 1424-8220
YR 2016
FD 2016
LK http://uvadoc.uva.es/handle/10324/40960
UL http://uvadoc.uva.es/handle/10324/40960
LA eng
NO Sensors, 2016, vol. 16, n. 10. 14 p.
NO Producción Científica
DS UVaDOC
RD 22-dic-2024