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Liu, Yongzhen; Li, Xiaohua; Xu, Allan; Nasser, Azmi F.; Heidbreder, Christian
Journal of pharmaceutical and biomedical analysis, 02/2016, Letnik: 120Journal Article
Display omitted •A LC–MS/MS method was validated for buprenorphine, norbuprenorphine and naloxone.•The LLOQ of buprenorphine and norbuprenorphine was 20pg/mL.•The LLOQ of naloxone was 1pg/mL (the lowest LLOQ reported for biological samples).•The method was successfully applied in clinical pharmacokinetic study. A simple, sensitive and rapid liquid chromatography/electrospray ionization tandem mass spectrometry (LC–ESI-MS/MS) method was developed and validated for simultaneous quantification of naloxone, buprenorphine and its metabolite norbuprenorphine in human plasma. Human plasma samples were extracted using a single step liquid–liquid extraction, and then separated on an Imtakt Unison UK-C18 column (2.1×50mm, 3μm) using alkaline mobile phases with gradient elution. All of the analytes were detected in positive ion mode using multiple reaction monitoring (MRM). The method was validated and the specificity, linearity, lower limit of quantitation, precision, accuracy, recoveries and stability were determined. The linear range was 20–10000pg/mL for buprenorphine and norbuprenorphine; and 1–500pg/mL for naloxone. The correlation coefficient (R2) values for all three analytes were ≥0.995. The precision and accuracy for intra-day and inter-day were <11.0%. The recoveries were >63% and matrix effects were tracked by the deuterated internal standards (IS) with the IS-normalized matrix factor ranging from 0.96 to 1.33 for all three analytes. The validated method was successfully applied in a clinical pharmacokinetic study with low dose administration of sublingual buprenorphine and naloxone.
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