Orthogonal Test for Optimization of Total Saponin of Gynostemma pentaphyllum Extraction by Decompressing Inner Ebullition
In order to optimize the extraction technology of total Saponin of Gynostemma pentaphyllum by decompressing innner ebullition, the technology was established between the extraction yield of total Saponin and several independent variables (the concentration of desorption agent, solid-liquid ratio, extraction temperature and time) through orthogonal test ,which was based on the single factor experiment. Experiment results show that the optimum extraction conditions for 5.0 g raw materials are as followed: the volume fraction of ethanol solution saturated the materials is 60% , the volume of water is 19 times to material. The extraction process can finish after 5 min at 50 °C twice. The results indicate that orthogonal test design can be an effective method to optimize the extraction technology of total Saponin of Gynostemma pentaphyllum through decompressing innner ebullition.