title: Determination of 1,4-benzodiazepines by high-performance liquid chromatography-electrospray tandem mass spectrometry.
abstract: A sensitive and selective method to determine diazepam, N-desmethyldiazepam, nitrazepam, flunitrazepam and medazepam in human serum and urine was established employing solid-phase extraction and high-performance liquid chromatography-electrospray tandem mass spectrometry (HPLC-ESI-MS-MS) with the selected reaction monitoring (SRM) mode. Using diazepam-d5 and N-desmethyldiazepam-d5 as internal standards, recoveries between 90.4 and 109.7% were determined. The routine quantification limit was set at 2 ng/ml for serum and urine at a signal-to-noise ratio of 10:1.
authors.affiliation: Lehrstuhl für Lebensmittelchemie, Universität Würzburg, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Kleinschnitz
authors.forename: M
authors.initials: M
authors.lastname: Herderich
authors.forename: P
authors.initials: P
authors.lastname: Schreier
mesh_terms: D001569:Benzodiazepines / Q000032:analysis* / Q000097:blood / Q000652:urine; D002138:Calibration; D002851:Chromatography, High Pressure Liquid; D006801:Humans; D013058:Mass Spectrometry; D012015:Reference Standards
chemical_list: D001569:Benzodiazepines