Study on Extraction of Flavonoids from Blood Orange Peel

The extraction conditions of Soxhlet extraction of blood reflux extraction of flavonoids from orange peel were explored with the single factor experiment and orthogonal experiment,such as the ethanol concentration,extraction temperature,the extraction time,the solid-liquid ratio,the yield of the flavonoids.The results showed the optimum extraction conditions were the ethanol concentration of 80%,extraction temperature of 95 ℃,the extraction time of 2.5 h and the solid-liquid ratio of 1:40,in which the yield of flavonoids in blood orange peel could reach 1.515%.