TABLE II.
QTRAP 5500 MS Ion Pairs, Dwell Times, and Optimized Voltagesa
| Androgen | Molecular formula | Parent mass + H (m/z) | Fragment mass + H (m/z) | Dwell time (msec) | Declustering potential (V) | Collision energy (V) | Exit potential (V) |
|---|---|---|---|---|---|---|---|
| ASD | C19H26O2 | 286.9 | 97.0 | 125 | 100 | 27.0 | 12.0 |
| T | C19H28O2 | 288.9 | 97.0 | 125 | 112 | 27.0 | 12.0 |
| DHEA | C19H28O2 | 289.0 | 271.1 | 125 | 70.0 | 11.0 | 14.0 |
| DHT | C19H30O2 | 290.9 | 255.1 | 125 | 105 | 21.0 | 12.0 |
| AND | C19H30O2 | 290.9 | 273.2 | 125 | 100 | 13.0 | 12.0 |
| d3-T | C19H25D3O2 | 291.9 | 97.0 | 100 | 112 | 27.0 | 12.0 |
| d3-DHT | C19H27D3O2 | 293.9 | 258.1 | 100 | 105 | 21.0 | 12.0 |
a
Entrance potential = 10 V; pause time = 5 msec.