| Sample % level | Amount added (µg/mL) | Amount found (µg/mL) | % Recovery | Mean recovery |
| 50% | 60 | 59.3 | 98.8 | 99.5 |
| 50% | 60 | 59.8 | 99.6 | |
| 50% | 60 | 60.1 | 100.1 | |
| 100% | 80 | 79.4 | 99.25 | 99.38 |
| 100% | 80 | 79.1 | 98.8 | |
| 100% | 80 | 80.1 | 100.1 | |
| 150% | 100 | 99.8 | 99.8 | 99.7 |
| 150% | 100 | 100.3 | 100.3 | |
| 150% | 100 | 99.2 | 99.2 |