Mehdi Rezaei, Ali Ramazani * and Fahimeh Hokmabadi Pages 561 - 567 ( 7 )
Introduction: The purpose of this study is the development and validation of assay test for Tenofovir Disoproxil Fumarate (TDF), Emtricitabine (FTC) and Efavirenz (EFV) in combined tablet dosage form by Reverse Phase (RP) HPLC.
Materials and Methods: The assay method by HPLC was found to be linear in the concentration range of 15-150 µg/mL, 10-100 µg/mL and 30-300 µg/mL for TDF, FTC, and EFV, respectively. Successful separation of combined drugs was achieved by isocratic elution on a Phenomenex® C8 column (250 mm × 4.6 mm, 5µm). The mobile phase was composed of buffer pH: 7.0 ± 0.05 potassium dihydrogen phosphate, acetonitrile and methanol (40:40:20 v/v) at the flow rate of 1 mL/min using UV detection at 262 nm, column oven temperature 25ºC, and injection volume 20 µL.
Results: The analytical results were validated by recovery studies. All the parameters of validation were in the acceptance range. This developed method was successfully applied for simultaneous estimation the amount of TDF, FTC and EFV in the bulk and marketed dosage forms.
Tenofovir, Emtricitabine, Efavirenz, RP-HPLC, simultaneous estimation, validation.
Department of Chemistry, University of Zanjan, P.O. Box: 45195-313, Zanjan, Department of Chemistry, University of Zanjan, P.O. Box: 45195-313, Zanjan, Chemistry and Chemical Engineering Research Center of Iran, P.O. Box 14335-186, Tehran 1496813151