Table 1 Coded and actual levels of independent variables for optimization of total polyphenol extraction yield as determined by Box−Behnken design
Independent Variables | Coded Levels | ||
|---|---|---|---|
–1 | 0 | + 1 | |
Extraction Temperature (°C) | 40 | 50 | 60 |
Amplitude Level (%) | 30 | 60 | 90 |
Water/meal ratio | 20 | 30 | 40 |
Extraction Time (Minutes) | 20 | 40 | 60 |
Extraction pH | 4 | 6 | 8 |