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

Table 7

Results of robustness checks.

Components	Method	No. of samples	Mean	Variance	value
					F-test	t-test
Caffeine	HPLC	60	2.69	1.329	0.832	0.688
	NIR	60	2.63	1.364
Moisture content	Lamdry	60	46.51	769.770	0.989	0.984
	NIR	60	46.58	786.460
EGCG	HPLC	60	4.27	4.069	0.895	0.812
	NIR	60	4.21	3.887