3.1.2. Effect of ratio of solvent to material
3.1.3. Effect of duration of microwave radiation
Temperature Ratio of solvent to material (mL/g)
MAE time (min) Concentration of aqueous ethanol (%)
Fig. 1. The effect of temperature, ratio of solvent to material, duration of microwave radiation and the concentration of aqueous ethanol on the extraction yields: ( a ) temperature, (b) ratio of solvent to material, (c) extraction time, and (d) concentration of aqueous ethanol. Data represent means ± SD of three independent experiments.
In order to determine the optimum duration of microwave radiation, approximately 2 g of dried material sample was extracted
with 40 mL of 90% (v/v) ethanol at 80 C. The duration of microwave radiation