Aging of Malbec Wines from Mendoza and California: Evolution of Volatile Composition

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Figure 1
A) Principal component analysis (PCA) separation of samples by aging time and region using volatile composition. Mendoza_t0 are shown as pink dots; California_t0, as cyan dots; Mendoza_t7, as pink diamonds; and California_t7, as cyan diamonds. Confidence ellipses were calculated at a significance level of α = 0.05. B) Percentage contribution of variables (volatile compounds) to PC1 in PCA of young versus old wine samples.
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Figure 2
(A) Principal component analysis (PCA) separation of samples by region of origin at t7, using volatile composition. Argentinian wines are shown as pink dots and California wines, as cyan dots. Confidence ellipses were calculated at a significance level of α = 0.05. B) Percentage contribution of variables (volatile compounds) to PC1 in PCA comparing wine regions (Mendoza versus California) after seven years of aging.

Table 1
Wine regions from Mendoza, Argentina and California, USA included in the study.
Table 2
A list of the compounds measured using headspace solid-phase microextraction gas chromatography-mass spectrometry, their CAS number, retention time, retention index (RI), calculated retention index (CRI), and selected ion monitoring (SIM) qualifying ions.
Table 3
Predominant volatile compounds at t0 and t7 in Malbec wines from Mendoza and California, with origin and associated aromatic descriptors.
Table 4
Predominant volatile compounds at t7 in Malbec wines from Mendoza and California, and associated aromas.

Vol 74 Issue 1