Extraction optimization and antioxidant activity of Phyllanthus urinaria polysaccharides

Three extraction parameters including time, material to solvent ratio, and temperature for the yield of Phyllanthus urinaria polysaccharides were optimized by response surface methodology. The results revealed that optimal process was time 5.3 h, 93 °C, ratio 1:47 g/mL, under which polysaccharide 6.40%; three had significant effect on yield, influence greatest lowest. antioxidant activity test indicated equivalent scavenging ability DPPH ABTS free radicals 0.88 0.84 μg TBHQ/μg polysaccharides, respectively; while reducing power total capacity 93.62% 93.55% TBHQ, respectively. good activity.