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Experimental range and levels of the independent variables of selected components used for response surface central composite design
| Variable | Components | −α | −1 | 0 | +1 | +α |
|---|---|---|---|---|---|---|
| A | CMC | 0.159104 | 0.5 | 1.0 | 1.5 | 1.840896 |
| B | MgSO4 | −0.1034 | 0.05 | 0.275 | 0.5 | 0.653403 |
| C | pH | 5.977311 | 7 | 8.5 | 10 | 11.02269 |
