The E-Nose based in quartz microbalances provides an effective and
rapid tool to the objective classification of fivewine types obtained from
the same grape varietywith ethanol contents from 11,5 to 18% (v/v) and
different composition in the major volatile compounds. The good linear
correlation (R=0.909) obtained for a linear combination of PCs calculated
from E-Nose and the GC–chemical results for each type of wine show
as the results provided by the E-Nose can be validated. New sensors
made with other metalloporphyrins and further experimental works
will be required to a good discrimination of wines containing 18% (v/v)
of ethanol and showing significant differences in the contents of ethyl esters
among the major volatile compounds. The E-Nose is revealed like a
powerful tool for the objective differentiation of the wines obtained
from the authorized grape variety in a Protected Denomination of Origin.
Moreover, other studies will be carried out to use this technique in other
applications for the wine industry, such as the quality control in the market
and in the wine chain production and subsequently in the detection
of frauds.