Hair testing for &UDelta;(9)-THC-COOH by gas chromatography/tandem mass spectrometry in negative chemical ionization mode.Marsili RMartello SFelli MFiorina SChiarotti MRapid Communications in Mass Spectrometry: RCMMarsili R,Martello S,Felli M,et al.Hair testing for delta9-THC-COOH by gas ...
The determination of 11-nor-delta 9-tetrahydrocannabinol-9-carboxylic acid (THCCOOH), the major urinary metabolite of delta 9-tetrahydrocannabinol (THC), in meconium is extremely difficult because of the high concentration of lipids in the specimen and the low concentration of drug present. A simpl...
We describe a method for quantifying 11-carboxy-delta-9-tetrahydrocannabinol (THC-COOH) in meconium. After adding a labeled internal standard (THC-COOH D9) and acetonitrile, samples are sonicated to release both free and conjugated THC-COOH. The acetonitrile/aqueous layer is removed and mixed ...
Seminal THC was moderately correlated with serum levels of THC (r = 0.66), serum 11-OH THC (r = 0.57), and serum THC-COOH (r = 0.67). Seminal delta-9 THC was not correlated with urinary cannabinoid levels or semen analysis parameters.Conclusion This is the first study to identify and...
We recognized significantly lower Delta 9-THC-COOH concentrations for CYP2C9*3 (p = 0.001) and a trend of lower Delta 9-THC-COOH concentrations for CYP2C9*2 which did not reach statistical significance (p = 0.068). In addition, this study showed significantly higher values in the ratio ...
BACKGROUND: Whole blood, plasma and urine delta-9-tetrahydrocannabinol (THC), 11-hydroxy-THC (11-OH-THC) and delta-9-carboxy-THC (THCCOOH) concentrations document cannabis exposure. Clinical data generally are derived from specimens obtained after single THC administrations. Few data are available...
Hair analysis for△~9-THC,△~9-THC-COOH,CBN and CBD,by GC/MS-EI Comparison with GC/MS-NCI for△~9-THC-COOH. Maria J,Paula V,et al. Forensic Science . 2002Baptista M.J,Paula V.M,Estela G.P.M.et al.Hair analysis for D9-THC, D9-THC-COOH, CBN and CBD,...
Comparison between GC–MS and the EMIT (VIVATWIN) immunoassays for the determination of delta 9-THC-COOHdoi:10.1016/j.toxlet.2011.05.321Y. H. GheatFuel and Energy Abstracts
The determination of 11-nor-delta9-THC-9-carboxylic acid (THC-COOH) in hair specimens at the sensitivity required to detect marijuana users is a difficult analytical problem. A sensitive and specific method has been developed for the quantitative assay of THC-COOH in hair. Hair specimens were ...
Whole blood, plasma and urine Delta9-tetrahydrocannabinol (THC), 11-hydroxy-THC (11-OH-THC) and Delta9-carboxy-THC (THCCOOH) concentrations document cannabis exposure. Clinical data generally are derived from specimens obtained after single THC administrations. Few data are available from daily ...