| Sample % level | Amount added (µg/mL) | Amount found (µg/mL) | % Recovery | Mean recovery |
| 50% | 6 | 5.95 | 99.1 | 98.2 |
| 50% | 6 | 5.86 | 97.6 | |
| 50% | 6 | 5.89 | 98.1 | |
| 100% | 8 | 7.98 | 99.7 | 99.9 |
| 100% | 8 | 7.90 | 98.75 | |
| 100% | 8 | 8.1 | 101.25 | |
| 150% | 10 | 10.1 | 101 | 99.6 |
| 150% | 10 | 9.9 | 99 | |
| 150% | 10 | 9.89 | 98.9 |