Jayewardene A L, Kearney B, Stone J A, Gambertoglio J G, Aweeka F T
Department of Clinical Pharmacy, Drug Research Unit, School of Pharmacy, University of California, San Francisco, CA 94143-0622, USA.
J Pharm Biomed Anal. 2001 May;25(2):309-17. doi: 10.1016/s0731-7085(00)00506-9.
A method for the determination of indinavir (IDV) (L-735 524) in human plasma by LC-MS-MS is discussed, and the validation data is presented. The analyte and internal standard are isolated from plasma by a simple acetonitrile precipitation of plasma proteins followed by centrifugation. LC-tandem mass spectrometry in positive ion, multiple reaction monitoring mode used pairs of ions at m/z of 614/421 for indinavir and 628/421 for internal standard, respectively. The calibration curve had a linear range from 3.0 to 12320 ng/ml when linear least square regression weighing 1/x was applied to the concentration versus peak area plot. The advantages of this method are the fast sample preparation, wide dynamic assay range and quick analysis taking only 5 min for each sample run. The robust nature of this assay has been further verified during routine use over several months involving multiple analysts.
