because of the high dielectric properties of the solvent, especially ethanol and methanol, and further dilution with water that increases the heat capacity of the solvent combination [ 7 ] . Higher extraction time usually tends to increase the extraction yield. However, this increase was found to be very small with longer time [ 41 ] . Irradiation time is also influenced by the dielectric properties of the solvent. Solvents such as water, ethanol, and methanol may heat up tremendously on longer exposure, thus risking the future of thermolabile constituents [ 13 ] .