Table 1.
Running order of roselle seed oil extraction based on central composite design using RSM and its corresponding observed oil yield (%)
| Run | Sample weight (g) | Solvent volume (ml) | Time (h) | Yield (%) |
|---|---|---|---|---|
| 1 | 12.0 | 250.0 | 7.0 | 14.07 |
| 2 | 9.6 | 329.7 | 7.6 | 14.14 |
| 3 | 12.0 | 300.0 | 7.0 | 15.06 |
| 4 | 12.0 | 300.0 | 7.0 | 15.06 |
| 5 | 12.0 | 300.0 | 7.0 | 15.06 |
| 6 | 16.0 | 300.0 | 7.0 | 16.45 |
| 7 | 14.4 | 270.3 | 6.4 | 13.98 |
| 8 | 12.0 | 300.0 | 7.0 | 15.06 |
| 9 | 12.0 | 300.0 | 8.0 | 19.54 |
| 10 | 14.4 | 329.7 | 7.6 | 22.11 |
| 11 | 12.0 | 350.0 | 7.0 | 17.13 |
| 12 | 14.4 | 270.3 | 7.6 | 19.48 |
| 13 | 9.6 | 329.7 | 6.4 | 14.04 |
| 14 | 14.4 | 329.7 | 6.4 | 15.86 |
| 15 | 9.6 | 270.3 | 6.4 | 13.18 |
| 16 | 8.0 | 300.0 | 7.0 | 13.85 |
| 17 | 9.6 | 270.3 | 7.6 | 15.18 |
| 18 | 12.0 | 300.0 | 6.0 | 14.89 |
| 19 | 12.0 | 300.0 | 7.0 | 15.06 |
| 20 | 12.0 | 300.0 | 7.0 | 15.06 |