title: Liquid chromatographic-tandem mass spectrometric determination of amprenavir (agenerase) in serum/plasma of human immunodeficiency virus type-1 infected patients receiving combination antiretroviral therapy.
abstract: A selective assay method for quantitation of amprenavir (agenerase) in human immunodeficiency virus type-1 infected patient serum or plasma using liquid chromatography-tandem mass spectrometry (LC-MS-MS) is described. Amprenavir and an internal standard (reserpine) are extracted by liquid-liquid extraction and chromatographically separated by a reversed-phase C18-analytical column. The triple quadrupole LC-MS-MS system is operated in the positive-ion mode and multiple reaction monitoring is used for drug quantitation. The method has been validated over the range of 0.05-10.0 microg/ml. The RSDs for the intra-day and inter-day determinations ranged from 5.3 to 6.1% and from 4.7 to 6.2%, respectively. The average assay accuracy at two different concentrations ranged from 96.0 to 103.0% and the extraction recovery of amprenavir was 90.8%. The lower limit of quantitation was 0.05 microg/ml. Using a short microbore column, the analysis was completed in less than 5 min.
authors.affiliation: Consolidated Laboratory Services,Van Nuys, CA 91406-1902, USA. sgunawan@pacificoaks.com
authors.forename: S
authors.initials: S
authors.lastname: Gunawan
authors.forename: M P
authors.initials: MP
authors.lastname: Griswold
authors.forename: D G
authors.initials: DG
authors.lastname: Kahn
mesh_terms: D019380:Anti-HIV Agents / Q000097:blood* / Q000627:therapeutic use; D002219:Carbamates; D002853:Chromatography, Liquid / Q000379:methods*; D005663:Furans; D015658:HIV Infections / Q000097:blood* / Q000188:drug therapy; D017320:HIV Protease Inhibitors / Q000097:blood* / Q000627:therapeutic use; D015497:HIV-1; D006801:Humans; D013058:Mass Spectrometry / Q000379:methods*; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013449:Sulfonamides / Q000097:blood* / Q000627:therapeutic use
chemical_list: D019380:Anti-HIV Agents; D002219:Carbamates; D005663:Furans; D017320:HIV Protease Inhibitors; D013449:Sulfonamides; C095108:amprenavir