Table 1 Orthogonal test factors and level tables
Factor | A | B | C | D | E |
|---|---|---|---|---|---|
Level | Solid–liquid ratio (Times) | Extractant concentration (mol/L) | Ultrasound time (min) | Centrifugal speed (r/min) | Crush mesh (Mesh) |
1 | 1:20 | 0.5 | 20 | 3000 | 50 |
2 | 1:30 | 0.7 | 35 | 5000 | 70 |
3 | 1:50 | 0.9 | 50 | 6000 | 90 |