Q-absorbance ratio method

The present research work discusses the two new, simple, accurate, precise and reproducible UV spectrophotometric methods have been developed and validated for the simultaneous determination of Prasugrel (PRASU) and Aspirin (ASP) in their combined dosage form.  Method- I is based on simultaneous equation method using two wavelengths, 254 nm (λmax of PRASU) and 276 nm (λmax of ASP). Method - II Q‐absorption ratio method using two wavelengths, 274.7 nm (Isoabsorptive point) and 254 nm (λmax of PRASU). Methanol was the solvent used in all methods. This method obeyed Beer’s law in the concentration range of 5-60 µg /ml for PRASU and 20-140 μg/ml ASP. All methods were validated statistically and recovery studies were carried out. Hence, the methods herein described can be successfully applied in quality control of combined pharmaceutical dosage form.