Multivariate Statistical Analysis Uncovers Spectrum–Effect Relationship between HPLC Fingerprints and Antioxidant Activity of Saffron

Figure 4

PCA scores plot of 21 batches of saffron (a), OPLS-DA diagram of 21 batches of saffron (b), and VIP plot of OPLS-DA of 13 characteristic peaks (c).

(a)

(b)

(c)