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Abstract

RP-HPLC method for the determination of losartan potassium and ramipril in combined dosage form

Author(s): K Srinivasa Rao, K Srinivas
Roland Institute of Pharmaceutical Sciences, Berhampur-760 010, Orissa, India

Correspondence Address:
K Srinivasa Rao Roland Institute of Pharmaceutical Sciences, Berhampur-760 010, Orissa India E-mail: [email protected]


A simple, specific and accurate reverse phase liquid chromatographic method was developed for the simultaneous determination of losartan potassium and ramipril in table dosage forms. A hypersil ODS C18, 4.6×250 mm, 5 µm column in isocratic mode, with mobile phase acetonitrile:methanol:10 mM tetra butyl ammonium hydrogen sulphate in water in the ratio of 30:30:40% v/v/v was used. The flow rate was 1.0 ml/min and effluent was monitored at 210 nm. The retention times of losartan potassium and ramipril were 4.7 and 3.3 min, respectively. The linearity range for losartan potassium and ramipril were in the range of 0.04-100 µg/ml and 0.2-300 µg/ml, respectively. The proposed method was also validated and successfully applied to the estimation of losartan potassium and ramipril in combined tablet formulations.

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