Table 5.

NIR PLS regression results for baicalin and total baicalein. The unit of SEC, SEP and SECV is %.

NIR	Baicalin
	Cross validation					Test-set validation
	Factors	R2	SEC	SECV	RPD	Factors	R2	SEC	SEP	RPD
1st der	3	0.83	1.45	1.63	2.34	4	0.83	1.09	1.77	2.16
2nd der	3	0.87	1.26	1.43	2.67	3	0.86	1.21	1.67	2.29
MSC	4	0.70	1.72	2.12	1.80	4	0.76	1.82	2.40	1.59
SNV	5	0.77	1.56	1.89	2.02	5	0.76	1.55	2.17	1.76
2nd der+MSC	2	0.86	1.34	1.46	2.60	3	0.87	1.14	1.52	2.50
SNV+2nd der	3	0.82	1.38	1.68	2.27	3	0.88	1.36	1.50	2.54
2nd der+SNV	2	0.86	1.32	1.46	2.62	3	0.87	1.12	1.54	2.47
NIR	Total baicalein
	Cross validation					Test-set validation
	Factors	R2	SEC	SECV	RPD	Factors	R2	SEC	SEP	RPD
1st der	2	0.81	1.28	1.45	2.26	2	0.78	1.16	1.48	2.22
2nd der	2	0.84	1.20	1.35	2.43	2	0.84	1.03	1.19	2.76
MSC	4	0.70	1.47	1.83	1.80	4	0.78	1.44	1.52	2.16
SNV	5	0.76	1.32	1.65	2.00	5	0.75	1.24	1.64	2.01
2nd der+MSC	2	0.84	1.23	1.36	2.42	2	0.83	1.13	1.34	2.46
SNV+2nd der	3	0.82	1.17	1.43	2.29	3	0.81	1.12	1.42	2.32
2nd der+SNV	2	0.84	1.21	1.35	2.44	2	0.83	1.12	1.36	2.41