Table 1.
Box–Behnken design and the responses measured.
| No. Exp. | Ethanol Concentration (%) | Solvent Ratio (mL/g) | Extraction Time (min) | Extraction Yield (mg/g) | ||
|---|---|---|---|---|---|---|
| FSA | PHI | RT | ||||
| 1 | 80 | 25 | 10 | 24.58 | 2.28 | 1.66 |
| 2 | 40 | 15 | 25 | 29.14 | 2.06 | 1.81 |
| 3 | 80 | 15 | 25 | 23.02 | 1.96 | 1.76 |
| 4 | 60 | 25 | 25 | 32.72 | 2.49 | 1.87 |
| 5 | 60 | 35 | 40 | 32.80 | 2.47 | 1.91 |
| 6 | 60 | 15 | 40 | 30.44 | 2.19 | 1.84 |
| 7 | 80 | 35 | 25 | 26.02 | 2.30 | 1.74 |
| 8 | 40 | 25 | 10 | 26.42 | 2.26 | 1.83 |
| 9 | 60 | 25 | 25 | 32.24 | 2.48 | 1.85 |
| 10 | 80 | 25 | 40 | 25.82 | 2.19 | 1.80 |
| 11 | 60 | 25 | 25 | 31.26 | 2.45 | 1.84 |
| 12 | 60 | 15 | 10 | 29.32 | 2.2 | 1.72 |
| 13 | 40 | 25 | 40 | 29.50 | 2.23 | 1.97 |
| 14 | 60 | 25 | 25 | 31.5 | 2.52 | 1.88 |
| 15 | 40 | 35 | 25 | 31.46 | 2.34 | 1.94 |
| 16 | 60 | 25 | 25 | 31.42 | 2.47 | 1.86 |
| 17 | 60 | 35 | 10 | 31.68 | 2.38 | 1.77 |