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Comparison of results of MPET and CHE.
| Independent Variables | Symbol | Coded Factor Level | ||||
|---|---|---|---|---|---|---|
| −2 | −1 | 0 | 1 | 2 | ||
| Rotational speed (rpm) | 1 | 200 | 300 | 400 | 500 | 600 |
| Grinding time (min) | 2 | 5 | 10 | 15 | 20 | 25 |
| Solvent to material ratio | 3 | 10:1 | 15:1 | 20:1 | 25:1 | 30:1 |
| Solid reagents (%) | 4 | 6 | 9 | 12 | 15 | 18 |
