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目的考察得到较优的桂枝总有机酸乙醇回流提取工艺。方法用正交设计试验,以总有机酸提取率为指标,考察乙醇浓度、料液比、提取次数3个因素对提取结果的影响。结果较优的提取工艺为乙醇浓度90%,料液比1∶8,提取次数3次。结论该工艺所得桂枝总有机酸提取率较高,工艺稳定、重复性好,适用于桂枝总有机酸的提取。
OBJECTIVE To investigate and optimize the reflux extraction of total organic acid from Guizhi Methods Using orthogonal design test, taking the total organic acid extraction rate as an index, the effects of three factors including ethanol concentration, solid-liquid ratio and extraction times on the extraction results were investigated. Results The optimal extraction process was ethanol concentration 90%, solid-liquid ratio 1: 8 and extraction times 3 times. Conclusion The results showed that the extraction rate of total organic acids from the cassia twig was high, the process was stable and the repeatability was good. It was suitable for the extraction of total organic acids from cassia twig.