Simultaneous analysis of dextromethorphan and its three metabolites in human plasma using an improved HPLC

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Taipei Medical University Institutional Repository > 藥學院 > 藥學系 > 期刊論文 > Item 987654321/1636

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題名:	Simultaneous analysis of dextromethorphan and its three metabolites in human plasma using an improved HPLC
作者:	許明照 Lin YS;Chen CH;Ho HO;Chen HH;Sheu MT
貢獻者:	藥學系
日期:	2007
上傳時間:	2009-08-17 09:56:14 (UTC+8)
摘要:	A simple and improved HPLC method with fluorometric detection for simultaneous determination of dextromethorphan (DM) and its three metabolites (dextrorphan (DX), 3-methoxymorphinan (MM), 3-hydroxymorphinan (HM)) in human plasma was developed and validated. The method involved a simple and efficient extraction protocol using an n-heptane/ethyl acetate (1:1) solvent mixture that achieved recoveries of 70-90% with an insignificant interference from the plasma matrix. The analysis was performed on a phenyl column with isocratic elution, a mobile phase composed of 20% methanol, 30% acetonitrile, and 50% KH2PO4 buffer (10mM, with adding 0.02% of TEA; adjusted with phosphoric acid to pH 3.5), and a run time of only 15 min. Linear calibration curves were constructed in the concentration range of 1-200 nM for DM and its three metabolites. The lower limit of quantitation (LLOQ) in human plasma was 1 nM for each compound. The coefficient of variation and RSE% of the intraday and interday analyses for DM and its three metabolites all complied with USFDA requirements. This analytical method was preliminarily applied to determine the polymorphic functions of CYP2D6 and CYP3A4 in the metabolic pathway of DM to DX and then to HM.
關聯:	J of Chromatography B.(859):141-146.
顯示於類別:	[藥學系] 期刊論文

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