title: Development and validation of a high-throughput zwitterionic hydrophilic interaction liquid chromatography solid-phase extraction-liquid chromatography-tandem mass spectrometry method for determination of the anti-influenza drug peramivir in plasma.
abstract: An assay for the analysis for the quantification of the anti-influenza drug peramivir in human plasma using high-throughput zwitterionic (ZIC) hydrophilic interaction liquid chromatography (HILIC) solid-phase extraction (SPE) in a 96-wellplate format and liquid chromatography coupled to positive tandem mass spectroscopy has been developed and validated. The ZIC-HILIC SPE efficiently removed sources of interference present in the supernatant after protein precipitation of plasma proteins. The main advantage of the ZIC-HILIC SPE sample preparation step was that it allowed load and elution conditions to be optimised to extract only peramivir and minimize co-extraction of lipophilic phospholipids. The method was validated according to published US Food and Drugs Administration guidelines and showed excellent performance. The assay was validated over two calibration ranges (0.952-500 and 50-50,000 ng/mL) to support analysis of peramivir after intra-venous administration. The lower limit of quantification for peramivir in plasma was 1 ng/mL and the upper limit of quantification was 50,000 ng/mL. The within-day and between-day precisions expressed as RSD, were lower than 8% at all tested quality control concentrations and below 11% at the lower limit of quantification. Validation of over-curve samples ensured that it would be possible with dilution if samples went outside the calibration range.
authors.affiliation: Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand. niklas@tropmedres.ac
authors.forename: N
authors.initials: N
authors.lastname: Lindegardh
authors.forename: W
authors.initials: W
authors.lastname: Hanpithakpong
authors.forename: A
authors.initials: A
authors.lastname: Phakdeeraj
authors.forename: P
authors.initials: P
authors.lastname: Singhasivanon
authors.forename: J
authors.initials: J
authors.lastname: Farrar
authors.forename: T T
authors.initials: TT
authors.lastname: Hien
authors.forename: N J
authors.initials: NJ
authors.lastname: White
authors.forename: N P J
authors.initials: NP
authors.lastname: Day
mesh_terms: D000146:Acids, Carbocyclic; D000998:Antiviral Agents / Q000097:blood*; D002853:Chromatography, Liquid / Q000379:methods*; D003517:Cyclopentanes / Q000097:blood*; D006146:Guanidines / Q000097:blood*; D006801:Humans; D012015:Reference Standards; D015203:Reproducibility of Results; D053719:Tandem Mass Spectrometry / Q000379:methods*
chemical_list: D000146:Acids, Carbocyclic; D000998:Antiviral Agents; D003517:Cyclopentanes; D006146:Guanidines; C414210:peramivir