Synthesis and antioxidant activity of selenium polysaccharide from Lotus root

In this study, lotus root polysaccharide was taken as raw material. The preparation technology of its selenium established by response surface design, and antioxidant activity in vitro studied. Selenium content the detection index, effects reaction time, ratio sodium selenite to polysaccharide, volume fraction nitric acid on were investigated. Through method, optimal synthesis conditions obtained follows: time 5.36h, is 0.78, 0.47%, 0.1106%. Selenium, a from root, had scavenging effect ABTS radical superoxide ion, maximum rate 52.17% 85.23%, respectively. Aa shows that synthesized can be used an or functional food.