Samenvatting
Following a research program regarding individuals suspected of driving under the influence of alcohol and/or drugs, a representative sampling of blood specimens (450 from 4000) has been analysed for the presence of drugs. For this purpose radioimmunological analysis (RIA) was employed. Positive results were found in 17.6 % of the cases examined. In addition to RIA, gas chromatographic and mass spectrometric analysis was performed for further detection of drugs, which cannot be identified by the RIA.