title: Quantitative high-performance liquid chromatography of diazepam and N-desmethyldiazepam in blood.
abstract: High-performance liquid chromatography on porous silica has been employed to determine diazepam and N-desmethyldiazepam in human blood. For forensic purposes, 1.0 ml of blood is sufficient for a quantitative determination of the benzodiazepines in concentrations above 100 ng/ml. In cases where lower levels, 25-100 ng/ml, are of interest, 2.0 ml of blood together with a somewhat more elaborate extraction procedure are necessary.
mesh_terms: D002851:Chromatography, High Pressure Liquid; D003975:Diazepam / Q000097:blood*; D005554:Forensic Medicine; D008722:Methods; D008832:Microchemistry; D003708:Nordazepam / Q000097:blood; D012822:Silicon Dioxide
chemical_list: D003708:Nordazepam; D012822:Silicon Dioxide; D003975:Diazepam