| Time, min | Extraction Efficiency, % | ||
| Cu | Co | Ni | |
| 1 | 17.9 | 23.4 | 25.2 |
| 2 | 56.2 | 61.6 | 58.5 |
| 3 | 77.2 | 81.2 | 82.5 |
| 5 | 76 | 80.8 | 82.0 |
| 10 | 75.8 | 79.0 | 79.8 |