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

Table 2

Moisture, total flavonoids, and ellagic acid PLSR models with different pretreatments.

Components	Pretreatments	R	RPD	RMSEC	LVs
Moisture (%)	a	0.9571	3.5	0.424	10
	b	0.9503	3.2	0.451	9
	c	0.9778	4.8	0.306	10
	d	0.9788	4.9	0.300	10
	e	0.9202	2.6	0.553	6
	f	0.9748	4.5	0.321	8
		0.9756	4.6	0.318	9
Total flavonoids (mg/g)	a	0.9458	3.1	3.09	10
	b	0.9468	3.1	3.07	10
	c	0.9502	3.2	2.97	10
	d	0.9501	3.2	2.97	10
	e	0.8622	2.0	4.55	3
	f	0.8569	1.9	4.60	2
		0.8948	2.2	4.01	3
Ellagic acid (mg/g)	a	0.9671	3.9	7.28	10
	b	0.9716	4.2	6.77	10
	c	0.9748	4.5	6.32	9
	d	0.9608	3.6	7.72	7
	e	0.9742	4.4	6.4	9
	f	0.9680	4.0	7.05	8
		0.9602	3.6	7.71	6

Note. Description of preprocessing methods: “a” represents spectral no pre-treatment, “b” represents ECO, “c” represents MSC, “d” represents SNV, “e” represents MMN, “f” represents 1^st Der + SNV, and “” represents 1^st Der + MSC.