Figure 4.

(a) Separation of olive oils sold as extra virgin olive oil (EVOO) in Italy according to the origin of purchase in two-dimensional space by partial least squares discriminant analysis. Green cycles represent monocultivar protected designation of origin (PDO) EVOO purchased on family farms, while red cycles represent commercially-blended (CB) EVOO purchased in supermarkets (b) variable importance in projection (VIP) scores of the variables (lipids) most useful for the differentiation of monocultivar PDO EVOO and commercially-blended EVOO.