Simultaneous analysis of dextromethorphan and its three metabolites in human plasma using an improved HPLC method with fluorometric detection

Shyr Yi Lin, Chien Ho Chen, Hsiu O. Ho, Hsueh Hui Chen, Ming Thau Sheu

研究成果: 雜誌貢獻文章

28 引文 斯高帕斯(Scopus)


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 (10 mM, 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.
頁(從 - 到)141-146
期刊Journal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences
出版狀態已發佈 - 十一月 1 2007


ASJC Scopus subject areas

  • Biochemistry