we present a method for the simultaneous analysis of a variety of commonly abused drugs ( acetaminophen , theophylline , salicylate , primidone , methyprylon , phenobarbital , butabarbital , ethchlorvynol , butalbital , chlordiazepoxide , pentobarbital , amobarbital , phenytoin , glutethimide , secobarbital , flurazepam , nitrazepam , methaqualone , n-desmethyldiazepam , and diazepam ) in serum or plasma .
C0229671
serum
C0032105
plasma