DEVELOPMENT AND VALIDATION OF A BIOANALYTICAL RP-HPLC METHOD FOR AZILSARTAN MEDOXOMIL WITH LIQUID-LIQUID EXTRACTION
Journal Title: International Journal of Pharmacy and Pharmaceutical Sciences - Year 2016, Vol 8, Issue 2
Abstract
Objective: There are many analytical methods available for estimation of Azilsartan medoxomil in biological samples and for pharmaceutical preparations. However, no specific RP-HPLC method with UV detection based on liquid-liquid extraction technique is available for estimation of Azilsartan medoxomil in human plasma. Methods: A simple, rapid and accurate RP-HPLC with UV detection method was developed and validated as per US-FDA guidelines for the estimation of Azilsartan medoxomil in spiked human plasma using liquid-liquid extraction technique. Results: Azilsartan medoxomil was well resolved from human plasma interference and internal standard (Aceclofenac) using C 18 (250 × 4.6 mm, 5 μ) column with methanol: 20 mm phosphate buffer (pH 3.0), (70: 30 %, v/v) as mobile phase, at a flow rate of 1 ml/min. The detection was performed at 249 nm. The calibration curve was found linear in the range of 500-16000 ng/ml. During calibration experiments, the heteroscedasticity was minimized by using weighted least square regression model with weighing factor 1/x². In accuracy and precision studies, intra-day and inter-day, % relative error was found between±15 and % RSD was less than 15 %. Stability experiments indicated that the drug remained stable after three freeze-thaw cycles. Conclusion: A simple, rapid and accurate RP-HPLC method with UV detection was developed and validated for estimation of Azilsartan medoxomil based on liquid-liquid extraction technique. The developed method meets the requirements of US-FDA guidelines. Also the developed method does not require expensive chemicals and solvents and does not involve complex instrumentation, hence it is economic.Â
Authors and Affiliations
Snehal Karpe, Sandeep Sonawane, Priya Rahade, Sanjay Kshirsagar
Keywords
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