Table 1.

Box-Behnken Design matrix and experimentally obtained results of investigated responses.

	Independent variables			Responses
Run	A: ultrasonic power(watt)	B: Time (Minutes)	C: Solid/solvent (%)	Amount of lutein(mg/g)	Antioxidant activity (%)
1	70	12.5	15.75	21.23	91.05
2	70	12.5	15.75	21.05	90.62
3	50	20	15.75	10.63	74.95
4	70	20	1.5	14.76	84.39
5	70	20	30	16.01	86.71
6	70	5	1.5	10.04	78.66
7	70	5	30	11.81	80.93
8	70	12.5	15.75	21.03	92.87
9	90	5	15.75	9.54	76.34
10	90	12.5	1.5	11.15	77.45
11	70	12.5	15.75	21.06	90.05
12	50	12.5	30	8.91	70.54
13	50	5	15.75	7.14	66.17
14	70	12.5	15.75	20.02	90.32
15	50	12.5	1.5	8.85	67.85
16	90	12.5	30	13.95	79.65
17 Predicted value Experimental value	90 70.00 70.00	20 12.50 12.50	15.75 15.75 15.75	10.99 20.87 21.23 ± 0.89^a	73.94 90.98 90.32 ± 1.68^b