Table 3.

The experimental design and results of 29 runs for the RSM experiment of the flavonoid extraction process.

No.	A	B	C	D	Yield (%)
1	45	70	20	70	1.931
2	45	70	25	80	1.823
3	45	60	25	70	2.479
4	50	60	30	70	2.136
5	45	50	20	70	2.136
6	45	50	25	80	2.004
7	40	60	30	70	2.076
8	45	60	25	70	2.457
9	45	50	30	70	2.280
10	45	70	25	60	1.569
11	45	50	25	60	1.870
12	45	60	20	80	1.980
13	40	70	25	70	1.799
14	50	50	25	70	2.082
15	45	60	25	70	2.387
16	45	70	30	70	1.950
17	40	60	25	80	2.008
18	40	60	20	70	1.921
19	45	60	25	70	2.360
20	50	70	25	70	1.870
21	45	60	30	60	1.906
22	50	60	25	80	2.040
23	45	60	20	60	1.822
24	40	50	25	70	2.130
25	45	60	30	80	2.124
26	40	60	25	60	1.739
27	45	60	25	70	2.387
28	50	60	20	70	2.080
29	50	60	25	60	2.013