Optimization of ultrasonic extraction technology of blood orange peel polysaccharide by response surface

The process of ultrasonic extraction of polysaccharide from blood orange peel was optimized by response surface tests. The optimum ultrasonic extraction conditions were obtained through the analysis of each factor: ultrasonic power was 320 W,liquid-solid ratio was 30 m L·g-1,extraction temperature was 60 ℃ and extraction time was 20 min. With this process,the relatively higher yields of polysaccharide reached 24.7%. The reproducibility of the experiments was good and the extraction process was stable and feasible.This study showed a certain reference value for the development and utilization of polysaccharide from blood orange peel residues.