[Screening of benzo- and thienodiazepines in urine with Emit ST and thin-layer chromatography within the scope of substance abuse].

All 24 Benzo- and Thienodiazepines which are used in drugs in the FRG were added to drug free urine in different concentrations and examined by Emit ST as well as by TLC. In addition the acid hydrolysis products of diazepines were analysed by TLC. A modification of the extraction procedure is described, which shortens analysis time considerably. The detection limits were determined and it will be discussed how both methods, Emit and TLC, are suited for a wide-ranging drug screening program.