Abstract: In order to improve the extraction efficiency and color stability of anthocyanins from Lycium ruthenicum Murr,the high-efficiency solvent extraction method was used for extraction.The effects of static extraction temperature,ethanol concentration,static extraction time,static extraction pressure and number of cycles on the extraction efficiency were investigated.The extraction process was optimized by response surface methodology,and the color stability of the extracted anthocyanin solution was studied.The results showed that the optimal extraction conditions were temperature 48 °C,ethanol concentration 60%,extraction time 4 min,static extraction pressure 8 MPa,cycle twice.Under this condition,the anthocyanin extraction rate was 1.989%.When the preservation temperature was 4 °C and the pH was 2.5,the anthocyanin solution of the L. ruthenicum was stable.

Key words: Lycium ruthenicum Murr, high-efficiency solvent extraction, anthocyanins, process optimization, color stability