Table 1 Extraction factors and levels
Control factors | Symbols | Units | Level 1 (−1) | Level 2 (0) | Level 3 (+1) |
|---|---|---|---|---|---|
Irradiation time | A | min | 30 | 60 | 90 |
Microwave power | B | W | 250 | 300 | 350 |
Feed particle size | C | mm | 0.105 | 0.154 | 0.300 |
Molar ratio | D | ml/g | 6 | 8 | 10 |
Control factors | Symbols | Units | Level 1 (−1) | Level 2 (0) | Level 3 (+1) |
|---|---|---|---|---|---|
Irradiation time | A | min | 30 | 60 | 90 |
Microwave power | B | W | 250 | 300 | 350 |
Feed particle size | C | mm | 0.105 | 0.154 | 0.300 |
Molar ratio | D | ml/g | 6 | 8 | 10 |