Shimadzu-1800 UV/visible spectrophotometer were used
for analysis. The bulk sample of PS was gifted by ESPEE
Formulation Pvt. Ltd., Rajkot, India. Commercial tablets of
PS (Brand name) were purchased from local market. All
other chemicals and solvents used were of analytical
grade. Calibration curve method was used for the
estimation of phenytoin sodium. The API was accurately
weighed (10mg) and transferred to a 100 ml volumetric
flask. To this add methanol to dilute the API and make up
the volume with methanol up to the mark. This stock
solution was further diluted with distilled and used in rest
of the experiments [