Antioxidant activity of extract of Lvliang jujube

Antioxidant substances of Lvliang jujube was extracted by 80%vol ethanol.The content of total polyphenols,DPPH free radical scavenging activity,reducing power and the hydroxy free radical scavenging ability of extract were analyzed.The jujube non-enzyme antioxidant concentration of solution was set as 1.34mg/ml,2.69mg/ml,5.38mg/ml,10.75mg/ml and 21.5mg/ml.The total content of extracted phenol was 3.22mg/g;DPPH free radical scavenging ability of extraction was increased with the increment of concentration of extract,which was higher than that of BHT.The reduction ability was also enhanced with increasing extract concentration,which was significantly higher than that of BHT.The scavenging activity of hydroxyl radical was increased with the enhancement of extract concentration,and the range was from 15.25% to 62.74%.