3.2.4. Optimal processing conditions and verification of results
The optimum values of selected variables were selected on the basis of response surface. In summary, the optimal conditions of MAE process to obtain the highest flavonoids yield (15.64 ± 0.76 mg/g) from the leaves of C. paliurus were determined as follows: temperature of 76.8 C, ratio of solvent to material of 21.4:1, concentration of alcohol of 63.2% and extraction time of 15 min.