Table 2.

Levels selected for each factor for the validation assays of ethanol and acetone extraction models and respective experimental (mean ± standard deviation) and predicted responses.

T (°C)	t (h)	L/S (mL/g Dry GP)	Solvent (%)	TPh (mg GAE/g Dry GP)
				Experimental	Predicted
Ethanol extraction
60	1.50	25	50	40.4 ± 1.8	43. 6
50	1.50	25	50	34.4 ± 1.0	36.6
50	1.25	15	30	28.3 ± 2.9	27.2
40	0.75	15	30	20.6 ± 0.1	21.7
50	1.00	20	70	27.5 ± 0.01	30.0
Acetone extraction
50	1.50	25	50	54. 6 ± 3.4	55.6
40	1.50	25	50	49.4 ± 0.9	48.9
45	1.25	15	30	35.9 ± 1.4	38.2
35	0.75	15	30	34.9 ± 0.6	34.7
40	1.00	20	70	40.9 ± 4.1	40.4

T—temperature; t—time; L/S—liquid–solid ratio; TPh—total phenolic content; GAE—gallic acid equivalents; GP—grape pomace.