【摘要】 以乙醇浸膏得率和浸膏中氮质量分数为评价指标,选择乙醇体积分数、乙醇与水蛭质量比、提取时间为考察因素,利用正交实验L9(34)确定乙醇提取水蛭最佳工艺条件为:φ(乙醇)=50%,m〔φ(乙醇)=50%〕∶m(水蛭)=6∶1,提取时间1 5h,共提取2次。平均乙醇浸膏得率13 24%,浸膏中平均氮质量分数w(N)=11 05%。更多还原

【Abstract】 With extraction rate and mass fraction of nitrogen in the extract as assessment indices,the optimum extracting conditions for Whitmania pigra Whitman were studied by the orthogonal design.Thus,extracting for twice (1.5 h each) with φ (ethanol)=50% and m (ethanol)∶ m (Whitmania pigra Whitman)=6∶ 1,the average extraction rate and the mass fraction of nitrogen in the extract were 13.24% and 11.05%( n =3) respectively.更多还原