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VARIATIONS IN CHLOROGENIC ACID CONTENT IN EUPATORIUM ADENOPHORUM SPRENG FROM DIFFERENT AREA,ELEVATION AND HARVEST TIME

SONG Xiaojing1) GUO Zhen2) YUAN Hongxia3) LI Huamin3) WANG Junru1)(1)College of Science,Northwest A & F University,712100,Yangling Shanxi,China;2) Department of Chemistry,Qinghai Normal University,810008,Xining,China;3) College of Chemistry,Beijing Normal University,100875,Beijing,China)  
Accumulation dynamic of chlorogenic acid in Eupatorium adenophorum Spreng was investigated.Chlorogenic acid content in Eupatorium adenophorum Spreng,as determined by high performance liquid chromatography(HPLC),was higher in leaves than in flowers or stems,was decreased at altitude higher than 1900 meters,was higher when harvested in April than in July.Therefore chlorogenic acid content in Eupatorium adenophorum Spreng is related to growing area,altitudes,harvesting time and plant parts.
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