Table 2.

The BBD matrix and the obtained results at different levels of the experimental variables.

No.	A: Ethanol Concentration (%)	B: The Ratio of Liquid to Material (mL/g)	C: Extraction Time (min)	Y: Total Saponin Content (mg/g)
1	80	20	40	34.25 ± 0.86
2	70	30	40	35.12 ± 0.97
3	70	20	30	42.33 ± 1.05
4	70	20	30	41.65 ± 1.16
5	60	20	40	28.50 ± 0.59
6	70	10	20	34.00 ± 0.82
7	80	30	30	34.16 ± 0.75
8	60	30	30	29.88 ± 0.68
9	80	10	30	33.48 ± 1.03
10	70	30	20	35.82 ± 0.68
11	70	10	40	36.89 ± 0.96
12	60	20	20	32.25 ± 0.72
13	60	10	30	30.59 ± 0.78
14	70	20	30	41.23 ± 0.99
15	70	20	30	42.12 ± 1.21
16	70	20	30	42.27 ± 1.12
17	80	20	20	33.67 ± 0.72