For simultaneous separating glycyrrhizic acid with surface activity from Glycyrrhiza and baicalin without surface activity from Scutellaria simultaneously

a novel technology for foam fractionation of the leaching liquor of Glycyrrhiza and Scutellaria was developed.The fluorescence emission spectra

UV absorption spectra and FTIR spectra showed that there was complexing action between glycyrrhizic acid and baicalin.The compatibility of Glycyrrhiza and Scutellaria enhanced the extraction of glycyrrhizic acid and baicalin

accomplished the separation of baicalin by foam fractionation

and improved the foam fractionation performances of glycyrrhizic acid.Using enrichment ratio and recovery percentage as the evaluation indexes

the effects of temperature

volumetric air flow rate

the initial concentration of glycyrrhizic acid and the mass ratio of Glycyrrhiza and Scutellaria on the foam fractionation performances were investigated.The results showed that the enrichment ratio and the recovery percentage of glycyrrhizic acid reached 11.0 and 73.5% with the enrichment ratio and the recovery percentage of baicalin reached 5.8 and 38.5%

respectively

under the conditions of temperature 40℃

volumetric air flow rate 100 ml·min-1

the initial concentration of glycyrrhizic acid 0.2 g·L-1 and the mass ratio of Glycyrrhiza and Scutellaria 3:1.In this work

baicalin was separated by foam fractionation for the first time.Compared to the technology of foam fractionation of the leaching liquor from Glycyrrhiza

the novel one increased the enrichment ratio and the recovery percentage by 194.9% and 23.3%

respectively.Therefore

the addition of Scutellaria effectively improved the foam fractionation performances of glycyrrhizic acid and baicalin.