正交法试验比较甘草浸膏的提取工艺

An Orthogonal Method for Comparing Extracting Techniqucs of Licorice Root Extract

采用正交法设计Ｌ＿９（３￣４）表，考察了甘草粒度、提取溶媒、提取次数等３个因素，以甘草酸收率为考察指标，比较甘草浸膏的提取工艺。结果表明：甘草以机械切片，用含氨０．３％的６０％乙醇作溶媒进行回流提取３次，甘草酸的收率可达１０％以上，比水提法的收率提高７％左右。

L_9(3￣4) form developed by the orthogonal method was used to study the size,extraction solvent and extrac-tion frequency of licorice root extract,and taking the recovery of glycyrrhizic acid as the criteria,a comparison wasmade on the different ways of extracting the herb. The result showed that glycyrrhizic acid could be recovered over10%(about 7%higher than that from water treatment) when the herb was, cut into pieces and then extracted byfluxing for 3 times with 60%alcohol containing 0.3%ammonia.