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采用Ls(4×2~4)正交表进行番泻叶最佳提取工艺的优选,考察溶剂浓度、溶剂用量倍数、提取时间、提取次数4个因素对番泻叶中总番泻甙的浸出率的影响,结果表明,其最佳提取工艺为A_2B_2C_1D_2,即溶剂为50％乙醇、溶剂用量为20倍、微沸提取15min、提取次数为2次。
Ls (4×2~4) orthogonal table was used to optimize the extraction process of senna. The solvent concentration, solvent dosage multiple, extraction time and extraction frequency were used to examine the leaching of total senna in senna. The effect of the rate showed that the best extraction process was A 2 B 2 C 1 D 2 , ie the solvent was 50% ethanol, the solvent amount was 20 times, the micro-boiling extraction was 15 min, and the extraction times were 2 times.