The drug release studies were done by measuring the absorbance of the released drug at the characteristic maximum wavelength of DCF (224 nm) using UV -Vis spectrophotometer (Lambda XLS/XLS + Perkin Elmer UK). The drug loaded samples were immersed in pure solvent, ethanol (10 mL). At specific intervals, 2 mL of the solution was pipetted out for absorbance measurement and fresh ethanol was transferred back to the release medium to maintain a constant volume.