INVESTIGADORES
MONGE Maria Eugenia
congresos y reuniones científicas
Título:
Trends Towards An Electronic Nose-Electronic Tongue Fusion Applied to Discrimination of Wines
Autor/es:
MARIANA LANGENHEIM; MAGALÍ LOVINO; MARÍA EUGENIA MONGE; DANIELA MIZRAHI; R. MARTÍN NEGRI
Lugar:
Praga, República Checa
Reunión:
Workshop; "Interdisciplinary aspects of Human-Machine Co-existence and Co-operation"; 2005
Resumen:
Wines of different
wineries and different varietals were discriminated by using a combined
approach of a gas sensors array (electronic nose) and liquid phase sensors.
Different commercial Argentine wines of two varietals, Malbec and Chardonnay,
were analyzed. The gas phase of the
wines was analyzed with an electronic nose developed in our laboratory. The
liquid phase was analyzed by pH, electrical conductivity and PVC-based membrane
potentiometric measurements. The whole data set was studied with different combinations
of the sensors used such as e-nose, e-nose + conductivity, e-nose +
conductivity + pH, etc. These data were examined with two multivariate methods:
principal component analysis (PCA) and cluster analysis (CA). The best
discrimination was obtained when the sensors signals corresponding to the
measurements of both gas and liquid phases were jointly analyzed. PCA plots
showed a clear qualitative discrimination of the wines, and the cluster
analysis correctly classified thirty three over a total of thirty four samples.
The complete analysis showed that only the simultaneous analysis of gas and
liquid phases provided a relatively simple, effective and fast discrimination
of wines of different wineries and different varietals, in contrast to the
individual e-nose or e-tongue analysis.