Table 2.
Variables and factor levels for optimization of extraction.
| Independent Variables | Symbol | Levels | ||
|---|---|---|---|---|
| −1 | 0 | 1 | ||
| Temperature (°C) | A | 40 | 50 | 60 |
| Time (min) | B | 10 | 15 | 20 |
| Solvent-to-solid ratio (mL/g) | C | 20 | 30 | 40 |
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