Huang W A, Meng Y, Huang P L
Guangxi, Yulin pharmaceutical Factory.
Zhongguo Zhong Yao Za Zhi. 1994 May;19(5):283-4, 319.
A L9(3(4)) form developed by the orthogonal method was used to study the size, extraction solvent and extraction frequency of licorice root extract, and taking the recovery of glycyrrhizic acid as the criteria, a comparison was made on the different ways of extracting the herb. The result showed the glycyrrhizic acid could be recovered over 10% (about 7% higher than that from water treatment) when the herb was cut into pieces and then extracted by fluxing for 3 times with 60% alcohol containing 0.3% ammonia.
采用正交法设计的L9(3(4))表，考察甘草根提取物的粒度、提取溶剂及提取次数，以甘草酸的回收率为指标，比较不同的药材提取方式。结果表明，将药材切成片，用含0.3%氨的60%乙醇回流提取3次，甘草酸的回收率可达10%以上(比水处理法高约7%)。
