Rapid Quality Assessment of Polygoni Multiflori Radix Based on Near-Infrared Spectroscopy

Table 4

Comparison of quantitative model wavelength selection.

Ingredients	Method	Wavenumber	LVs	Calibration			Prediction
					RMSEC (%)	RMSECV (%)		RMSEP (%)	RPD
Moisture	None	2666	7	0.82	0.24	0.91	0.72	0.65	1.7
	MCUVE	84	4	0.87	0.81	0.89	0.78	0.63	1.8
	CARS	68	4	0.97	0.29	0.38	0.93	0.29	3.8
	RF	113	4	0.96	0.30	0.41	0.93	0.30	3.7
Stilbene glycosides	None	2666	4	0.52	0.32	0.77	0.28	0.81	1.0
	MCUVE	126	4	0.76	0.63	0.69	0.61	0.71	1.1
	CARS	108	4	0.93	0.33	0.45	0.91	0.41	1.9
	RF	68	4	0.89	0.32	0.49	0.87	0.63	1.2
Anthraquinone glycosides	None	2666	6	0.58	0.54	0.69	0.54	0.75	0.8
	MCUVE	156	4	0.74	0.53	0.47	0.74	0.45	1.3
	CARS	59	5	0.92	0.31	0.45	0.89	0.44	1.4
	RF	98	5	0.86	0.40	0.56	0.77	0.45	1.3

The bold values in the table are the model parameter values under the best wavelength selection, and the bold is for emphasis.