Rapid and Green Methods for Qualitative Classification of Polygonati Rhizoma and Polygonati Odorati Rhizoma Using a Handheld near Infrared Instrument

Figure 2

Scores plot of the PCA models developed with calibration set samples included in this study (a) 2D, (b) 3D, and their corresponding loadings (c).

(a)

(b)

(c)