Rapid Quality Identification of Decoction Pieces of Crude and Processed Corydalis Rhizoma by Near-Infrared Spectroscopy Coupled with Chemometrics

Table 9

Results of NIR quantitative model evaluation and selection of factors.

Components	R^2	RMSEC (%)	RMSEP (%)	RMSECV (%)	Factors
Protopine	0.9978	0.3518	0.5573	0.2220	7
Palmatine chloride	0.9959	0.4136	0.6458	0.7980	6
Berberine	0.9994	0.0676	0.0764	0.2540	7
Dehydrocorydaline	0.9872	0.6930	0.8810	0.9843	5
Tetrahydropalmatine	0.9981	0.1530	0.3810	0.2326	7
Tetrahydroberberine	0.9976	0.3920	0.6138	0.5480	7
Corydaline	0.9918	0.5510	0.7230	0.3385	5