Study on Factors Affecting the Extraction Process of Flavonoids from Sea Buckthorn Leaves
In this article,ethanol/water solution was used as the extraction agent to extract flavonoids from sea buckthorn leaves.The effects of ethanol concentration,extraction temperature and extraction time on the extraction efficiency were investigated,and a chemical kinetic model was fitted to the experimental data.The experimental results showed that the optimum conditions for the extraction of flavonoids from defatted seabuckthorn leaf powder were ethanol mass fraction of 60%,extraction temperature 65℃and extraction time 60 min.Under this condition,the extraction efficiency of flavonoids was 4.12%(mass fraction).The results of chemical kinetics fitting showed that the second-level kinetic model had a high degree of fitting with the extraction process data of flavonoids,and the mean relative deviation is±3%.This study can provide basic data support for promoting the industrialization of extracting flavonoids from sea buckthorn.
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