determination of repaglinide in human plasma by high-performance liquid chromatography–tandem mass spectrometry

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ID: 235851
2011
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Abstract
A rapid and sensitive method based on high-performance liquid chromatography–tandem mass spectrometry (LC–MS/MS) has been developed for the determination of repaglinide in human plasma. The analyte and internal standard (I.S.), diazepam, were extracted from plasma (25 μL) by liquid–liquid extraction with diethyl ether–dichloromethane (60:40, v/v) and separated on a XDB-C18 column using acetonitrile–ammonium acetate buffer (pH 6.8, 0.01 mol/L) as mobile phase. The retention times of repaglinide and I.S. were 1.95 and 2.35 min, respectively. Detection was carried out using API 4000 mass spectrometer with an ESI interface operating in the multiple reaction monitoring (MRM) mode. The assay was linear over the concentration range 0.050–50 ng/mL with a limit of detection (LOD) of 0.010 ng/mL. Intra- and inter-day precisions (as relative standard deviation, R.S.D.) were ≤5.07% and ≤11.2%, respectively, and accuracy (as relative error, R.E.) was from −0.593% to −1.26%. The assay was successfully applied to a pharmacokinetic study involving a single oral administration of a tablet containing 2 mg repaglinide to each of 10 healthy volunteers.
Reference Key
zhang2011actadetermination Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Jie Zhang;Feng Gao;Xin Guan;Yan-tong Sun;Jing-kai Gu;J. Paul Fawcett
Journal energy policy
Year 2011
DOI
10.1016/j.apsb.2011.04.004
URL
http://www.sciencedirect.com/science/article/pii/S2211383511000050
Keywords
pharmacokinetics lc–ms/ms pharmacology human plasmatherapeutics

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