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Levels of extraction variables for experimental designs
| Independent variables | Level total polyphenol and carotenoid contents | ||||
|---|---|---|---|---|---|
| +1 | 0 | −1 | +1.682 | −1.682 | |
| X1: Ethanol (%) | 100 | 65 | 30 | 123.86 | 6.137 |
| X2: Temperature (°C) | 60 | 45 | 30 | 70.23 | 19.773 |
| X3: Time (min) | 90 | 60 | 30 | 110.45 | 9.546 |
