“…This well known and documented screening procedure via acid hydrolysis, photolytical dealkylation, diazotization and coupling with Bratton-Marshall reagent to yield azo dyes [17] is applicable to the new benzodiazepines haloxazolam (via ABFB), ethyl 9For publications dealing with the analytical data of a single benzodiazepine see: alprazolam [67], brotizolam [66], clotiazepam [60], halazepam [61], loprazolam [64], midazolam [53], pinazepam [63], tetrazepam [58], triazolam [59] loflazepate and quazepam metabolites (via ACFB), cloxazolam, mexazolam and delorazepam (via ADB), quazepam und metabolites (via CFTB), pinazepam (via CPB), fludiazepam (via CFMB) and nimetazepam (via MNB). Because of its higher specificity and sensitivity, Bratton-Marshall detection should be preferred as a screening method when these benzodiazepines are encountered.…”