摘要
采用乙醇回流法从不同采收期的龙眼叶中提取黄酮类物质,并用紫外分光光度法测定其总黄酮含量。结果显示不同采收季节的龙眼叶中黄酮含量有所差异,其中以1月、7月、9月、11月含量较高,5月、8月、10月含量较低,总黄酮含量波动范围14%-19%,可适当注意不同采收期对其质量的影响。
The influence of total flavone from Longan leaves in different harvest time was studied.The leaves were collected each weak within one year.The total flavone was extracted by ethanol as the solvent with circumfluence extraction method and the content of the total flavone was dertermined by ultraviolet spectrophotometry method.The content of total flavone（14% - 19%） in Longan leaves changed in different harvest time.The content of total flavone was higher in January,July,September and November.The result showed harvest time had a little influence for the quality of the total flavone in Longan leaves.
出处
《广州化工》
CAS
2013年第16期76-77,共2页
GuangZhou Chemical Industry
基金
广东省东莞市及湛江市科技攻关计划项目(2011B037100058
2011108102020
2010C3111011)
广东省医学科研基金立项课题(A2012424)
广东医学院博士启动项目(XB1208
XK1005)
关键词
不同采收期
龙眼叶
紫外分光光度法
总黄酮
different harvest time
Longan leaves
ultraviolet spectrophotometry
total flavone
