Abstract: Jasmine total flavonoids have high medicinal value. To fully utilize the total flavonoids in jasmine, an extracting technology of the water bath method was used and optimized with response surface methodology. The results showed that factors affecting the extraction ratio of jasmine total flavonoids, in descending order of degree of influence, include the ratio of material to liquid, extraction temperature, extraction time, and ethanol concentration. The optimal process parameters for production include an extraction temperature of 70°C, extraction time of 60 minutes, material to liquid ratio of 1:50 (mL/mg), and ethanol concentration of 60%. Under these conditions, the maximum extraction rate reached 0.5663%. The extraction rate of jasmine total flavonoids after optimization was slightly higher than those in similar studies, indicating that the extraction method explored in this research has practical application value.

Key words: jasmine flower, total flavonoids, response surface optimization methodology