.3.4.2. Ultrasound-assisted extraction (UAE) ompare with conventional solvent extraction (CSE) Different methods are used to extract different natural substances, their extraction rate and efficiency are different. Table 4 explained the comparison of the extraction rates of flavonoid extraction yield rates between UAE and CSE under the best extraction conditions. As shown in Table 4, the UAE extraction rate was 1.63972%. The extraction effect is better than CSE (1.35943%). Moreover, the UAE takes only 47 min to extract and extraction temperature was 64°C, far below the CSE (180 min and 85°C). The result proved that UAE is better than CSE. Thus, UAE could be used as an effective method for the separation of flavonoids from Crinum asiaticum..com/