Table 1.
Design variable and code.
| Extraction | Code | Temperature (°C) | Time (min) | Ethanol Concentration (%) |
|---|---|---|---|---|
| Ethanolic | ||||
| −1 | 60 | 10 | 30 | |
| 0 | 70 | 15 | 45 | |
| 1 | 80 | 20 | 60 | |
| Aqueous | ||||
| −1 | 50 | 10 | ||
| 0 | 70 | 15 | ||
| 1 | 90 | 20 |
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