Abstract:

Crushed Cryptotaenia japonica Hassk was defatted with petroleum ether by heat trflux method. After dried at 60 ℃, the defatted Cryptotaenia japonica Hassk was used to extract total flavonoids with deionized water under the assistance of microwave. The microwave-assisted extraction technology of total flavonoids from defatted Cryptotaenia Japonica Hassk was optimized and their anti-oxidation properties were discussed in this study. The results demonstrated that the optimal extraction comditions were as follows: particle size of defatted Cryptotaenia japonica Hassk 80 mesh, material to loquid tatio 1:30 (W/V), extraction time 4 min, and extraction times 3. The crude flavonoids extract from Cryptotaenia japonica Hassk exhibited higher reducing power and hydroxyl radical scavenging capacity.

Key words: Cryptotaenia japonica Hassk, flavonoid, microwave extraction, anti-oxidation