Chemical Fingerprint Analysis for Discovering Markers and Identifying Saussurea involucrata by HPLC Coupled with OPLS-DA

Figure 2

The PCA and OPLS-DA models for classification of Saussurea involucrata, Saussurea orgaadayi, and adulterants based on chemical fingerprinting. The data were generated by a common pattern from the median (C), upper quartile (B), and 100% of the frequency domain (A).