Table 4.

Intra- and interday precision (n = 6).

Compound	Intraday			Interday
	Concentration (μg/mL)	Average peak area	% RSD	Concentration (μg/mL)	Average peak area	% RSD
Catechin	200	1507937	0.13	200	1537115	0.20
	400	2924044	0.27	400	2968715	0.23
	600	4458083	0.33	600	4444284	0.67
Epicatechin	200	1633896	0.03	200	1609962	0.08
	400	3065181	0.04	400	3079683	0.21
	600	4699541	0.21	600	4617629	0.06