Table 4.

Average and standard deviation (n = 3) of the concentrations of the phenolic compounds determined via HPLC in grape pomace extracts.

Solvent	Compounds	Retention Time (min)	Concentration (mg/100 Dry g GP)
50% Ethanol	Gallic acid	6.767	22.83 ± 0.23
	Chlorogenic acid	12.193	2.06 ± 0.11
	Vanillic acid	14.302	5.98 ± 0.06
	Caffeic acid	14.762	20.00 ± 0.09
	Syringic acid	16.113	16.36 ± 0.03
	p-Coumaric acid	25.568	1.67 ± 0.13
50% Acetone	Gallic acid	6.869	25.01 ± 0.19
	Chlorogenic acid	12.230	2.75 ± 0.09
	Vanillic acid	14.358	6.42 ± 0.04
	Caffeic acid	14.789	38.22 ± 0.25
	Syringic acid	16.140	16.18 ± 0.04
	p-Coumaric acid	25.570	1.03 ± 0.12