Development and Validation of Near-Infrared Methods for the Quantitation of Caffeine, Epigallocatechin-3-gallate, and Moisture in Green Tea Production

Table 3

Results of different spectral pretreatment methods.

Parameters	Pretreatment	RMSEC	Rc^2	RMSECV	LVs
Caffeine	MSC + FD + Ns	0.108	0.9957	0.16092	7
	MSC + FD + SG	0.115	0.9951	0.16382	7
	MSC + FD + N-d	0.118	0.9948	0.14580	9
	MSC + SD + Ns	0.206	0.9840	0.39435	5
	MSC + SD + S-G	0.179	0.9880	0.28295	6
	MSC + SD + N-d	0.140	0.9927	0.18781	10
Moisture content	MSC + FD + Ns	5.34	0.9812	5.68517	4
	MSC + FD + S-G	5.37	0.9810	5.69519	4
	MSC + FD + N-d	5.62	0.9792	5.76396	2
	MSC + SD + Ns	5.78	0.9780	6.45729	6
	MSC + SD + S-G	5.97	0.9765	6.20606	3
	MSC + SD + N-d	5.75	0.9783	5.89641	2
EGCG	MSC + FD + Ns	0.357	0.9827	0.39602	4
	MSC + FD + S-G	0.318	0.9863	0.38964	5
	MSC + FD + N-d	0.285	0.9890	0.32740	6
	MSC + SD + Ns	0.338	0.9845	0.43708	4
	MSC + SD + S-G	0.358	0.9826	0.39088	3
	MSC + SD + N-d	0.291	0.9885	0.31884	5