[Comparison of various immunologic methods with a GC-MS analysis in cannabinoid detection in urine]

60 urine samples which were sent within one month in order to be investigated on narcotic drugs were examined by means of 3 immunological methods EMIT, TDx and EIA (Roche) to prove cannabinoids and GC/MS procedure to investigate 11-Nor-delta-9-THC-9-carboxylic acid with 11-Nor-delta-8-THC-9-carboxylic acid as an internal standard. 50 of 51 cases which were proved to be positive by EMIT were confirmed by chromatography and were positive by the EIA method too. With TDx 40 of these cases corresponded one sample could not be measured. The applicability of the special immunological procedures to carry out quantitative analysis of the 11-Nor-delta-9-THC-carboxylic acid are presented.