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  • Title: Integrated method for the gas chromatographic determination of antiepileptic drugs in human plasma.
    Author: Patton JR, Hershey AE, Bius DL, Dudley KH.
    Journal: Ther Drug Monit; 1980; 2(4):397-409. PubMed ID: 7222193.
    Abstract:
    The principles of three independent extraction methods were utilized to develop an integrated extraction scheme for use in routine therapeutic monitoring of seven antiepileptic agents. The final method, in which the three extraction methods were interfaced, permitted routine monitoring in a single 1 ml volume of human plasma of any one or combination of the following drugs: phenytoin (PHT), phenobarbital (PB), primidone (PD), 5-ethyl-5-phenylhydantoin (EPH), ethosuximide (ES), carbamazepine (CBZ), and valproic acid (VPA). An on-column methylation technique was used for simultaneous determination of PHT, PB, PD, EPH, and ES. CBZ and VPA were determined by independent methods as the underivatized compounds. Six appropriate internal standards were employed in the integrated method for quantitation of the drugs.
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