Table 2.

Calibration Equations of Resveratrol, Hopeaphenol, and (+)-ɛ-Viniferin

Compound	Linear equation	R2	Conc. range (μg/mL)
Resveratrol	Y=39648X – 28476	0.9999	15.6–500
Hopeaphenol	Y=7857X – 3747	0.9999	15.6–500
(+)-ɛ-Viniferin	Y=15429X – 24840	0.9996	15.6–500