[Study on extraction technics and variety trends of the flavonoids in Sarcandrae glabra].
OBJECTIVE
To study on extraction technics and variety trends of the flavonoids in Sarcandrae glabra.


METHODS
By using S. glabra in Guizhou as materials and the experiment of L9 (3(4)) by ethanol as extracting way, The variety trends of the flavonoids from S. glabra are studied under the optimum extracting conditions during different raw stored times, different gathering season, different S. glabra position.


RESULTS
The flavonoid's contains was more low when the raw material was stored more long and descended average 24.74% annually. The flavonoid's contains had the tallest in 10-12 month by gathering indifferent season. The flavonoids contains were the tallest in the leaf of S. glabra in Guizhou than in the root and stem, and the contains were the lowest in stem.


CONCLUSIONS
The optimum conditions of extracting flavonoids from S. glabra are obtained when the condition is 60% of density of ethanol at 10 times of volume, 80 degrees C of extracting temperature, 3 h of extracting hours, 3 times of extracting number of times in 10-12 month, in the leaf, the raw material was stored more shortest, the flavonoid's contains had the tallest.
Yu
Jian-Sheng
JS
Tongren Vocational Institute, Tongren 554300, China. yujiansheng@sohu.com
Yu
Jian-Ping
JP
D000431:Ethanol / Q000737:chemistry; D005419:Flavonoids / Q000032:analysis / Q000302:isolation & purification*; D019684:Magnoliopsida / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D018517:Plant Roots / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D012621:Seasons; D013678:Technology, Pharmaceutical / Q000379:methods*; D013696:Temperature; D013997:Time Factors
D005419:Flavonoids; D000431:Ethanol