Five wines obtained from the same grape variety and viticultural zone were analyzed by gas chromatographic
(GC), chemical (CA) and electronic nose (E-Nose) techniques. The principal component (PC) analysis based
on the concentration of 11 volatile compounds, volatile acidity, ethanol, glycerol and 2,3-butanediol provides
2 PCs allowing 5 different groups to be established. Nevertheless 4 different groups of wines were obtained
by means of the first 2 PCs from E-Nose data. Wines with an ethanol content of 18% (v/v) and different concentration
in ethyl esters were not discriminated by the E-Nose, showing that new sensors will be required
for its differentiation. A good linear correlation (R=0.909) was obtained between a combination of the PCs
from the E-Nose data and those from GC-CA. The E-Nose is revealed as a rapid tool to differentiate among
wines obtained by different elaboration techniques, helping to protect the quality of wines produced in the
Protected Denominations of Origin.