Urinary cannabinoid analysis: comparison of four immunoassays with gas chromatography-mass spectrometry

Time-resolved fluoroimmunoassay for delta(9)-tetrahydrocannabinol as applied to early discrimination of Cannabis sativa plants

In the cultivations of Cannabis, it is important to be able to distinguish fiber-type plants from drug-type plants by an easy observation of their phenotype. This study required the screening of many samples for their cannabinoid content. A simple and highly sensitive time-resolved fluoroimmunological method was developed for the determination of Delta(9)-tetrahydrocannabinol in the leaf extracts. The useful range of the calibration curve was between 10 pg and 25 ng of standard. Matrix effects were minimized by a high dilution of samples.

Gas chromatographic-mass spectrometric methods of analysis for detection of 11-nor-delta 9-tetrahydrocannabinol-9-carboxylic acid in biological matrices

Gas chromatographic-mass spectrometric methods of analysis for the detection of 11-nor-delta 9-tetrahydrocannabinol-9-carboxylic acid, a major metabolite of delta 9-tetrahydrocannabinol, are reviewed. Emphasis is on analytical methodology including numerous derivatization techniques developed specifically for this analyte. The majority of procedures cited in the literature were developed to detect this metabolite in the blood and urine of man.