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Study on Flavonoids Extraction from Ginkgo biloba Linn Leaves by Supersonic

LIU Jing-zhi et al(Department of Tourism,Hebei Normal University,Shijiazhuang,Hebei 050031)  
Extraction progress of flavonoids in Ginkgo biloba Linn leaves by supersonic were studied.The optimum technical condition was 40 KHz,55 min,35 ℃ and static balance for 3 h.And the total flavone content could reach 1.07 %.According to qualitative experiment and UV spectroscopic analysis,the main flavone compound in Ginkgo biloba Linn was flavonol.
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