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Analysis of omeprazole, midazolam and hydroxy-metabolites in plasma using liquid chromatography coupled to tandem mass spectrometry

  • SUNY Buffalo

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

A method has been developed and validated for the quantitation of midazolam, alphahydroxy-midazolam, omeprazole, and hydroxyomeprazole from one 250 μL sample of human plasma using high performance liquid chromatography coupled to tandem mass spectrometry. The method was validated for a daily working range of 0.400-100 ng/mL, with limits of detection between 2 and 15 pg/mL. The inter-assay variation was less than 15% for all analytes at four control concentrations and the samples were stable for three freeze-thaw cycles under the analysis conditions and 24 h in the post-preparative analysis matrix. This method was used to analyze samples in support of clinical studies probing the activity of the cytochrome P-450 enzyme system.

Original languageEnglish
Pages (from-to)71-80
Number of pages10
JournalJournal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences
Volume824
Issue number1-2
DOIs
StatePublished - Sep 25 2005

Keywords

  • Analysis
  • CYP2C19
  • LCMS
  • Midazolam
  • Omeprazole

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