| Recovery level |
Desogestrel With Placebo |
| Amount added (mcg / ppm) |
Amount recovered (mcg / ppm) |
% Recovery |
Average recovery |
% RSD |
| 70% |
0.4168 |
0.4220 |
101.2 |
101.3 |
0.3 |
| 0.4168 |
0.4235 |
101.6 |
| 0.4168 |
0.4208 |
101.0 |
| 100% |
0.5954 |
0.6041 |
101.5 |
100.8 |
0.6 |
| 0.5954 |
0.6002 |
100.8 |
| 0.5954 |
0.5963 |
100.2 |
| 130% |
0.7740 |
0.7718 |
99.7 |
99.7 |
0.1 |
| 0.7740 |
0.7719 |
99.7 |
| 0.7740 |
0.7728 |
99.8 |
| Overall |
100.6 |
0.33 |
|