Study on Ultrasonic-Assisted Extraction of Flavonoids from Bamboo Leaves and Extraction Mechanism
In this paper,ultrasonic-assisted extraction method is used to extract flavonoids from bamboo leaves,and the optimal extraction conditions are obtained by response surface method.The results show that the optimal extraction conditions are ultrasonic power of 356 W,ultrasonic time of 15 min,ethanol concentration of 59.6%,solid-liquid ratio of 1∶27(g/mL),bamboo leaves powder size of 60~80 mesh and bamboo leaves infiltration time of 40 min.Under these conditions,the extraction rate of flavonoids from bamboo leaves could reach(1.647 5±0.064)%.In addition,the ultrasonic extraction mechanism is analyzed in this paper,and it is found that the thermal effect of ultrasonic wave provides a suitable temperature for the extraction of flavonoids from bamboo leaves,which is beneficial to the extraction of flavonoids from bamboo leaves.Meanwhile,ultrasonic wave degrades the cell wall of bamboo leaves and reduces the mass transfer resistance,and thus facilitates the dissolution of flavonoids from bamboo leaves.
flavonoids from bamboo leavesultrasonic extractionresponse surface methodextraction mechanism