Early Prediction of Shiraz Wine Quality Based on Small Volatile Compounds in Grapes

Figure 1

Principal component analysis (PCA) of wine and grape volatile compounds. Score plots comparing volatile profiles of (a) wine volatiles, (b) free and bound grape volatiles, and (c) only free grape volatiles, associated with wines that did and did not receive medals during professional scoring. Shading indicates the 95% confidence regions of the wines awarded with a medal (quality score >85%; red, n = 8) and not awarded a medal (quality score <85%; green, n = 8).

(a)

(b)

(c)