DOI: 10.36347/sajp

Pages: 123-127

Two simple, sensitive and precise UV spectroscopic and HPTLC methods were developed and validated for the determination of bosentan in tablet dosage form. UV spectroscopic method: For the determination of bosentan, the stock solution of 100 μg/ml of drug was prepared in dichloromethane. The measurement of absorbance was noted at 274 nm. The calibration curve was obtained in the range 10-40 μg/mL. The slope, intercept and correlation coefficient values were found to be 0.02975, -0.0063 and 0.9992, respectively. HPTLC method: For the determination of bosentan by HPTLC method, a precoated silicagel 60 F254 on aluminium sheets and a mobile phase system comprising of methanol: ammonia (10: 1 drop, v/v) were selected. After development the plate was scanned and quantified at 288 nm. Linearity was found in the concentration range of 10 to 80 ng/spot (r = 0.9991). Limit of detection was found to be 1 ng/spot and limit of quantification was found to be 4 ng/spot. Low relative standard deviation and good % recovery values of both the methods showed that the developed methods were highly precise, accurate and free from interference present in formulation.