抗氧化剂在预防疾病和延缓衰老等方面的作用,已广泛引起人们的关注,寻找更好更高效的抗氧化剂更为重要。文中采用DPPH法研究了26种植物的抗氧化活性,测定了它们的提取液对DPPH自由基的清除能力。实验结果表明:植物的抗氧化活性成分存在于醇溶液中而非水溶液中;在所选26种植物中,地瑜、鸡血藤、赤芍、虎杖4种植物的抗氧化活性较高,其中地瑜的抗氧化活性最高,其IC50为8.89μg/mL。

The effect of antioxidant in respect of preventing diseases and delaying aging has been paid attention. Searching better and higher effective antioxidant was even more important. In this article,antioxidant activity of 26 plants samples were studied by DPPH method,and DPPH free radical scavenging capability of extracts were determined. Experimental results showed that the antioxidant components were soluble in alcoholic solution but not in water; among these 26 plants,Radix sanguisorbae,Caulis spatholobi,Radix paeoniae Rubra and Polygonum cuspidate had higher antioxidant activities than other plants. Radix sanguisorbae was the highest with IC50 of 8.89 μg/mL.