Development and Validation of UV Spectroscopic Method for Estimation of Fisetin in Self Nanoemulsifying Drug Delivery System

Fisetin is a polyphenolic flavonoid which has been reported various pharmacological activities as a crude extract and in formulation form. This study was designed to develop and validate a simple and cost effective method for the estimation of fisetin in the liquid self nanoemulsifying drug delivery system (L-SNEDDS). Solutions having different concentration of fisetin were prepared in methanol to develop the calibration curve. The solutions were scanned at 362nm by using UV-spectrophotometer. Similarly, for validation of method recovery of drug was measured at three levels 80%, 100% and 120% of the mid concentration and data was recorded. Further, this method was used to measure the drug loading in L-SNEDDS of fisetin. The data was found to be linear in the range of 4–12μg/mL with regression coefficient of 0.999. The recovery of drug in the range of 95% to 105% indicated the accuracy of the method. The percentage relative standard deviation among all the responses was found to be less than 2% indicating the precision of the method. The LOD and LOQ was found to be 0.28 and 0.86μg/mL respectively. Drug loading in the L-SNEDDS was found to be 93.66%. A simple, accurate and cost-effective method for the estimation of the fisetin in pharmaceutical dosage forms was developed and validated using ultra violet spectroscopy.