7. Screening methods
Confirmatory tests
Immunoassay methods:
Immunoassay
kits
cross reactivity
THC-COOH
Dibenzopyran ring structure11-hydroxy-THC)9-
Carboxy-THC
TLC
0.55 mm
UV
25-50 µlTCH-
COOH
{Chloroform , Methanol, Conc. Ammonia (70:30:1)}
{Ethyl acetate, Methanol, Conc. ammonia, Water (12:5:1:0.5)}
Fast Blue B
diethylamine
UVTHC-COOH
RF–
THC-COOH
Efavirenz Naproxen Ibuprofen Piroxicam Sulindac Tolmetin
8. GC-MS
المستخدمالعمودFused silica, 10-30 m X 0.18-0.25 mm I.D.
with 0.25 μm chemically bonded phenylmethyl or dimethyl
polysiloxne stationary phase
الحاملالغازHelium at 2 ml/min
العمودارةرحدرجة150-220℃ to 210-290℃ at 5-25℃/min
المحقنارةرحدرجة250-260℃, operated in the splitless mode
نُّيالتامصدرElectron impact (EI) or chemical ionization (CI) mode
Confirmatory tests
PFPOH
PFPA
GC-MS
GC
9. GC-MS
THC-COOHCut-off
concentrationng/ml
RF
RF
TCH-COOH
1. Novel Automated Extraction Method for Quantitative Analysis of Urinary 11-nor-Ag-
Tetrahydrocannabinol- 9-CarboxylicAcid (THC-COOH).
2. Solid-Phase Extraction and GC-MS Analysis of THC-COOH Method Optimized for a High
Throughput Forensic Drug-Testing Laboratory.
3. Recommended methods for the detection and assay of cannabinoids in biological specimens