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pubmed-article:11585128pubmed:abstractTextWe present a simple and fast method for the determination of the novel antiepileptic drug topiramate in human plasma by high-performance liquid chromatography coupled with turbo ion spray mass spectrometry. Plasma sample pre-treatment was based on simple deproteinization by acetonitrile. Liquid chromatographic analysis was carried out on a reversed-phase column (C18, 125x4 mm I.D., 5 microm) using acetonitrile-ammonium acetate buffer, pH 6.3 as the mobile phase, at a flow-rate of 0.8 ml/min. Retention time for topiramate was 2.1 min. The detector was a single quadrupole mass spectrometer coupled to a turbo ion spray ion source and a heated nebulizer probe, operating in the positive ion mode. Ion source temperature was off; voltage was +5800 V; nebulizer and curtain gas flow-rates were 6 and 10 ml/min, respectively. Calibration curves for topiramate were linear over the range 1 to 20 microg/ml. Absolute recovery ranged between 92 and 95%. Intra- and inter-assay precision was <4%. The present procedure, omitting extraction and drying steps, is faster and simpler than the previously reported analytical methods for topiramate and was demonstrated to possess adequate sensitivity for routine therapeutic drug monitoring in plasma from patients with epilepsy.lld:pubmed
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pubmed-article:11585128pubmed:pagination133-7lld:pubmed
pubmed-article:11585128pubmed:dateRevised2006-11-15lld:pubmed
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pubmed-article:11585128pubmed:articleTitleSimple and rapid liquid chromatographic-turbo ion spray mass spectrometric determination of topiramate in human plasma.lld:pubmed
pubmed-article:11585128pubmed:affiliationLaboratory of Clinical Neuropharmacology, Institute of Neurology, University of Bologna, Italy. contin@neuro.unibo.itlld:pubmed
pubmed-article:11585128pubmed:publicationTypeJournal Articlelld:pubmed
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