Table I.
Validation Parameters for Δ9-Tetrahydrocannabinol (THC), 11-Hydroxy-Δ9-Tetrahydrocannabinol (11-OH-THC), and 11-nor-9-Carboxy-Δ9-Tetrahydrocannabinol (THCCOOH) in Urine by Gas Chromatography–Electron Impact-Mass Spectrometry
| Analyte | LOD (ng/mL) | LOQ (ng/mL) | Linearity (ng/mL) | Regression Equation*Calibration Curves (n = 6) | r2 (mean) |
|---|---|---|---|---|---|
| THC | 1.0 | 2.5 | 300 | y = 0.0348(0.0010)x + 0.0219(0.0914) | 0.999 |
| 11-OH-THC | 2.5 | 2.5 | 300 | y = 0.0341(0.0013)x + 0.0494(0.0312) | 0.995 |
| THCCOOH |
2.5 |
2.5 |
300 |
y = 0.0371(0.0089)x + 0.0211(0.0030) | 0.999 |
*
Mean value (standard deviation).