alexa Automated microanalysis of oxcarbazepine and its monohydroxy and transdiol metabolites in plasma by liquid chromatography.


Chemical Sciences Journal

Author(s): Rouan MC, Decherf M, Le Clanche V, Lecaillon JB, Godbillon J

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Abstract An automated high-performance liquid chromatographic method for the simultaneous determination of oxcarbazepine and its monohydroxy and transdiol metabolites in plasma is described. 5,6-Dihydro-11-oxo-11H-dibenz[b,e]azepine-5-carboxamide was used as internal standard. Liquid-solid extraction from plasma (100 microliters) on 50 mg Bond-Elut C18 cartridges was automatically performed by the Automatic Sample Preparation with Extraction Columns (ASPEC) system. A reversed-phase column (ODS Hypersil, 3 microns particle size, 4 cm x 4.6 mm I.D.) was used with acetonitrile-methanol-0.01 M potassium dihydrogenphosphate as mobile phase. The eluted compounds were detected at 210 nm. The limit of quantitation was 0.2 mumol/l for oxcarbazepine and 0.1 mumol/l for its metabolites. No interference with concomitantly administered anti-epileptic drugs such as phenobarbital, phenytoin, valproic acid or carbamazepine, was found.
This article was published in J Chromatogr B Biomed Appl and referenced in Chemical Sciences Journal

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