... BenzodiazepinesMass chromatograms of triazolam, 4-hydroxytriazolam, α-hydroxytriazolam and alprazolam (IS). A 100-ng aliquot each of triazolam, 4-hydroxytriazolam and α-hydroxytriazolam and 50 ... fludiazepam, 3: diazepam, 4: dipotassium clorazepate, 5: chlordiazepoxide, 6: oxazolam, 7: midazolam, 8: flunitrazepam, 9: flutoprazepam, 10: bromazepam, 11: prazepam, 12: nimetazepam, 13: mexazolam, ... limits of these 13 drugs were 1 5 ng/mL. For nitrazepam, mexazolam, nimetazepam, clonazepam, bromazepam, to sopam, estazolam and triazolam, quantitativeness could be observed in the range of 50 –1,000...