Ultrasound Extraction of Flavonoids from Cymbidium kanran Flowers

Extracting flavonoids in the flowers of Cymbidium kanran assisted with ultrasonic treatment was studied and the processing conditions optimized. Solid:liquid ratio, ethanol concentration and ultrasound application for the process were optimized by the single factor and L₉(3⁴) orthogonal experiments to arrive at the following conditions:1:20 for the solid:liquid ratio, 90% ethanol as the solvent, and 10 min for the ultrasonic treatment. The resulting flavonoid yield was 2.06%. The method seemed to perform with high reproducibility and stability rendering a flavonoid recovery rate of 98.10%-100.20%.