The
contents of flavonoid of Ginkgo biloba L. leaves from different extract solution with different
solvents were compared, and 70% ethanol was suggested for the better solvent according to the
consideration of lower cost and better beneficial result. When 3% (NH 4 ) 2 SO 4 , 6% (NH 4 )
2 SO 4 and 75% ethanol was used in turn to extract the same sample, the flavonoid was largely
found in the ethanol extract solution, and the flavonoid content wa...
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