Correlations on radioimmunoassay, fluorescence polarization immunoassay, and enzyme immunoassay of cannabis metabolites with gas chromatography/mass spectrometry analysis of 11-nor-delta 9-tetrahydrocannabinol-9-carboxylic acid in urine specimens

Drug Screening: A Comparison of Urinalysis Results from Two Independent Laboratories

Urinalysis for detection of drug abuse is widely used in pre-employment screening and correctional administration. Substantial protocols have been developed in these applications of drug testing to minimize the impact of any given vendor on results. Much less documentation exists for epidemiological drug testing programs such as the Arrestee Drug Abuse Monitoring (ADAM) program. This paper explores the impact that changes in laboratory vendors and data collection methods have on drug testing results. Here, we report the findings from a comparison study. The project was designed to determine the consistency of the urinalysis results when the same urine specimens were analyzed by two independent laboratories.

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.