Abstract:Emblica polysaccharides (EPS) have biological activities on free radical scavenging, anti-oxidation and anti-tumor. The effect factors on yield of emblica polysaccharides from Phyllanthus emblica extracted by ultrasound were studied. The results showed that the factors included ultrasonic power, ultrasonic time, solid-liquid ratio, ultrasonic extraction temperature. The optimal extraction condition were ultrasonic power of 475 W with solid (g) to liquid (mL) ratio of 1: 20 at 80℃ for 70 min, with the yield of 95.86 mg g-1 DW. Ultraviolet spectrum and FT-IR (fourier transform infrared spectroscopy) analysis showed that EPS was a α type acidic heteropolysaccharide containing pyran and glycuronic acid. The structural modification of EPS by ultrasonic radiation was not observed.
