Fig. 2. (A) PCA score plot in positive mode (R2X = 0.873, R2Q = 0.723). (B) OPLS-DA score plot in positive mode with statistical parameters (R2X = 0.656, R2Y = 0.989, Q2 = 0.974). (C) PCA score plot in negative mode (R2X = 0.888, R2Q = 0.741). (D) OPLS-DA score plot in negative mode with statistical parameters (R2X = 0.549, R2Y = 0.994, Q2 = 0.982). Blue triangles represent GCP samples, green triangle represent CP samples and pentacles represent QC samples.
