Table 2.
Results obtained under the experimental conditions using the L9(34) orthogonal design
| Trial | Pressure (A, MPa) | Time (B, h) | Temperature (C, °C) | Bulk density (D, kg/L) | Extraction yield (%) |
|---|---|---|---|---|---|
| 1 | 1 | 1 | 1 | 1 | 97.71 ± 0.32 |
| 2 | 1 | 2 | 2 | 2 | 97.75 ± 0.39 |
| 3 | 1 | 3 | 3 | 3 | 98.1 ± 0.21 |
| 4 | 2 | 1 | 2 | 3 | 97.94 ± 0.93 |
| 5 | 2 | 2 | 3 | 1 | 96.76 ± 0.77 |
| 6 | 2 | 3 | 1 | 2 | 98.82 ± 0.86 |
| 7 | 3 | 1 | 3 | 2 | 98.23 ± 1.14 |
| 8 | 3 | 2 | 1 | 3 | 96.11 ± 0.91 |
| 9 | 3 | 3 | 2 | 1 | 96.34 ± 0.44 |
| k1 | 96.91 | 97.75 | 97.56 | 96.94 | |
| k2 | 97.84 | 97.96 | 97.34 | 98.27 | |
| k3 | 97.85 | 96.89 | 97.7 | 97.4 | |
| R | 0.94 | 1.07 | 0.35 | 1.33 |