Determination of Multicomponents in Rubi Fructus by Near-Infrared Spectroscopy Technique

Table 3

Validation of the moisture, total flavonoids, and ellagic acid PLSR models.

Components	Pretreatments	R	RPD	RMSEP
Moisture (%)	c	0.9490	3.2	0.365	0.84
	d	0.9644	3.8	0.307	0.98
	f	0.9578	3.4	0.333	0.96
		0.9482	3.2	0.368	0.86
Total flavonoids (mg/g)	a	0.8505	1.9	3.09	0.88
	b	0.8981	2.3	2.90	0.94
	c	0.8853	2.1	3.05	0.97
	d	0.8826	2.1	3.06	0.97
Ellagic acid (mg/g)	b	0.9612	3.4	7.34	0.92
	c	0.9714	4.2	6.32	1.00
	e	0.9674	4.0	6.74	0.95
	f	0.9692	3.9	6.84	0.97

Note. Description of preprocessing methods: “a” represents spectral free pretreatment, “b” represents ECO, “c” represents MSC, “e” represents MMN, “f” represents 1^st Der + SNV, and “” represents 1^st Der + MSC.