TABLE 2.
Retention time, linearity, and sensitivity for each steroid.
| Steroid | Retention time (min) | Linearity | Sensitivity (ng/ml) | |||
|---|---|---|---|---|---|---|
| Range (ng/ml) | Equation | r 2 | LoD (S/N ≥ 3) | LLoQ (S/N ≥ 10) | ||
| Aldosterone | 1.69 | 0.1–20 | y = 0.9352x − 0.0133 | 0.9989 | 0.01 | 0.05 |
| 18OH coryicosterone | 1.83 | 0.1–20 | y = 0.0719x + 0.0031 | 0.9982 | 0.05 | 0.1 |
| Cortisone | 2.06 | 1.5–300 | y = 0.0479x + 0.0082 | 0.9996 | 0.1 | 1.0 |
| Cortisol | 2.21 | 1.5–300 | y = 0.0448x − 0.0078 | 0.9991 | 0.2 | 1.0 |
| 21-Deoxycortisol | 2.79 | 0.1–20 | y = 0.8178x + 0.0322 | 0.9967 | 0.05 | 0.1 |
| Corticosterone | 3.04 | 0.1–20 | y = 0.6865x + 0.0066 | 0.9997 | 0.01 | 0.05 |
| 11-Deoxycortisol | 3.19 | 0.1–20 | y = 0.8070x + 0.0156 | 0.9996 | 0.01 | 0.05 |
| Androstenedione | 3.68 | 0.1–20 | y = 0.2282x + 0.0027 | 0.9988 | 0.01 | 0.05 |
| Deoxcorticosterone | 3.98 | 0.1–20 | y = 1.0350x + 0.0001 | 0.9996 | 0.01 | 0.05 |
| Testosterone | 4.05 | 0.1–20 | y = 0.2941x − 0.0018 | 0.9998 | 0.01 | 0.05 |
| Androstenediol | 4.06 | 1.5–300 | y = 0.0045x + 0.0087 | 0.9952 | 1.0 | 1.5 |
| DHEA | 4.38 | 15–3,000 | y = 0.0004x + 0.0014 | 0.9995 | 4.0 | 15 |
| 17-OHP | 4.40 | 0.1–20 | y = 0.4351x + 0.0037 | 0.9995 | 0.01 | 0.05 |
| 17-hydroxy pregnenolone | 4.45 | 1.5–300 | y = 0.0068x + 0. 0034 | 0.9985 | 0.5 | 1.0 |
| Dihydrotestosterone | 5.36 | 0.1–20 | y = 0.6425x − 0.0044 | 0.9995 | 0.01 | 0.05 |
| Progesterone | 5.51 | 0.25–50 | y = 0.0307x + 0.0012 | 0.9995 | 0.02 | 0.1 |
| Pregnenolone | 5.57 | 0.25–50 | y = 0.0374x + 0.0125 | 0.9991 | 0.2 | 1.0 |