Table 2.

Optimal results of pretreatment methods that affect catechin content, in the PLS model.

Physical and Chemical Composition	Pretreatment Method PCs		Calibration Set		Prediction Set
			Rc	RMSECV	Rp	RMSEP
Total catechins	Z-Score	5	0.918	0.502	0.911	0.592
EGC	MSC	10	0.810	0.0095	0.769	0.0102
C	Z-Score	9	0.889	0.0301	0.883	0.0398
EC	SNV	7	0.903	0.0218	0.891	0.0311
EGCG	Z-Score	9	0.928	0.116	0.920	0.151
ECG	SNV	9	0.929	0.117	0.923	0.140