目的 優(yōu)選血三七Polygonum amplexicaule var.sinense中總黃酮的提取工藝。方法 以乙醇體積分?jǐn)?shù)、提取時(shí)間、乙醇倍數(shù)、提取次數(shù)為因素，以總黃酮提取率和浸膏得率為指標(biāo)，采用正交試驗(yàn)優(yōu)選提取工藝。結(jié)果 最佳條件為用10倍70%乙醇，提取3次，每次1.5 h。結(jié)論 優(yōu)選的工藝穩(wěn)定、合理，可用于血三七中總黃酮的提取。

Objective To optimize the extraction technology of total flavonoids from Polygonum amplexicaule var. sinense. Methods The extraction technology of total flavonoids was optimized by orthogonal test using ethanol concentration, ethanol ratio, extracting time, and extracting times as factors with the extraction of total flavone and extract yield as indexes. Results The optimal extraction technology was as follows: 10-folds of 70% ethanol, extracting for three times, and 1.5 h each time. Conclusions The optimal technology is stable and feasible for the extraction of total flavonoids from P. amplexicaule var. sinense.

湖南省中醫(yī)藥管理局課題（2013139）