title: Development of a simple column-switching high-performance liquid chromatography (HPLC) method for rapid and simultaneous routine serum monitoring of lamotrigine, oxcarbazepine and 10-monohydroxycarbazepine (MHD).
abstract: Using isocratic column-switching high-performance liquid chromatography (HPLC) we established a group method for automated quantitative analysis of the antiepileptic drugs lamotrigine, oxcarbazepine and its metabolite 10-monohydroxycarbazepine (MHD) that are also used in psychiatry as mood stabilizers. Samples were cleaned from interfering proteins and lipids by transfer onto a pre-column, using a PerfectBond C-8 material, with 8% acetonitrile in water as a pre-column eluent. Separation was performed by elution onto the analytical column (Betasil C6 5 microm, 250 mm x 4.6 mm) at a flow rate of 1.0 ml/min with potassium dihydrogenphosphate buffer (20 mmol/l, pH3.0)/acetonitrile (70/30; v/v) as analytical eluent. UV-spectrophotometric detection was set to 215 nm for all three compounds. The analytical run was finished within 18 min. Detection limit was 30 ng/ml for lamotrigine, 35 ng/ml for oxcarbazepine and 25 ng/ml for 10-monohydroxycarbazepine. The method was found to be suitable for automated analysis of serum samples of patients treated with lamotrigine and oxcarbazepine.
authors.affiliation: Clinical Pharmacology/Psychopharmacology of the Department of Psychiatry, Psychosomatic and Psychotherapy, University of Regensburg, Universitaetsstrasse 84, D-93053 Regensburg, Germany. christine.greiner@kinik.uni-regensburg.de
authors.forename: Christine
authors.initials: C
authors.lastname: Greiner
authors.forename: Ekkehard
authors.initials: E
authors.lastname: Haen
mesh_terms: D000818:Animals; D002220:Carbamazepine / Q000031:analogs & derivatives* / Q000097:blood; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D016903:Drug Monitoring; D006801:Humans; D000077213:Lamotrigine; D008297:Male; D000078330:Oxcarbazepine; D051381:Rats; D017207:Rats, Sprague-Dawley; D012015:Reference Standards; D012680:Sensitivity and Specificity; D014227:Triazines / Q000097:blood*
chemical_list: C523327:10-monohydroxycarbazepine; D014227:Triazines; D002220:Carbamazepine; D000077213:Lamotrigine; D000078330:Oxcarbazepine