Table 1.

Standard curves of (+)-catechins, caffeine and procyanidins.

	Standard Curve	R2
(+)-catechins	Y = (1.53376 × 107)X + 47476.3	0.9997
caffeine	Y = (7.26906 × 107)X + 245960	0.9995
procyanidins	Y = 0.242X + 0.0041	0.9983