Determination of 1,4-benzodiazepines and their metabolites by capillary electrophoresis and high-performance liquid chromatography using ultraviolet and electrospray ionisation mass spectrometry

Stephen McClean, E O'Kane, J Hillis, Franklin Smyth

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70 Citations (Scopus)

Abstract

A study is presented for the separation and determination of fifteen 1,4-benzodiazepine drugs and metabolites by capillary electrophoresis (CE) compared with high-performance liquid chromatography (HPLC). A comparison is made between the CE determination of the compounds by conventional UV detection and LC determination with electrospray ionisation (ESI) ion-trap mass spectrometry. CE is shown to provide superior separation to HPLC but the MS-MS capability of the ion-trap allows for the specific detection and determination of four of the compounds, diazepam, N'-desmethyldiazepam, oxazepam and temazepam in the hair of a patient under clinical treatment with diazepam and temazepam. Selected mixtures of drugs and metabolites are determined by CE and LC and the determination of diazepam and its metabolites by CE-UV-ESI-MS-MS is also presented. (C) 1999 Elsevier Science B.V. All rights reserved.
Original languageEnglish
Pages (from-to)273-291
JournalJOURNAL OF CHROMATOGRAPHY A
Volume838
Issue number1-2
Publication statusPublished - Apr 1999

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