| Added amount | Fulvestrant | Benzyl alcohol | Benzyl benzoate |
| % Recovery | % Recovery | % Recovery | |
| 50 % | 99.3 | 101.0 | 99.0 |
| 100 % | 99.2 | 100.6 | 99.7 |
| 150 % | 99.0 | 99.3 | 99.4 |