Oenological parameters and volatile aroma compounds were analyzed
in triplicate in each wine sample, whereas E-Nose analyses were
done in quadruplicate. The concentrations of 11 volatile aroma compounds,
butanediol and glycerol and the ethanol and volatile acidity
contents, were subjected to multiple comparisons in order to identify
significant differences with Bonferroni's test at a confidence level of
95%. The data provided by the E-Nose sensors and those obtained by
GC and CA analysis were subjected to PCA. A linear combination of selected
principal components (PCs) explaining an overall variance higher
than 99.5% was used to identity relationships between the E-Nose results
and those of the GC and CA analyses in the wines. All statistical
analyses were performed with the Statgraphics® Centurion XV.II software
package from Stat Points Technologies, Inc. (Warrenton, Virginia,
USA).