溪黄草根不同溶剂提取物的抗氧化性

考察7种溶剂(蒸馏水、60%乙醇、无水乙醇、甲醇、丁醇、氯仿和乙酸乙酯)对溪黄草根中可溶出成分的提取效果，研究7种提取物总酚含量、清除DPPH自由基能力、清除ABTS+ ·能力和螯合Fe2+的能力。结果表明：水和60%乙醇对溪黄草根中可溶出成分的提取效果最好；60%乙醇提取物总酚含量最高，清除DPPH自由基能力最高(超过迷迭香提取物、竹叶提取物、抗坏血酸棕榈酸酯)，清除ABTS+ ·能力最好(超过迷迭香提取物)，并具有较强的螯合Fe2+能力(超过迷迭香提取物、竹叶提取物、抗坏血酸棕榈酸酯)。

Antioxidant Activity of Different Solvent Extracts from Rabdosia serra (Maxim.) Hara Roots

The extraction efficiency of soluble components from Rabdosia serra (Maxim.) Hara roots using seven kinds of solvents such as distilled water, 60% ethanol, aqueous ethanol, methanol, butanol, chloroform and ethyl acetate was explored. Meanwhile, total phenol contents and the abilities to scavenge DPPH and ABTS free radicals and to chelate Fe2+ of seven different extracts were also evaluated. The results showed that water and 60% ethanol extracts had better effectiveness in extracting soluble components from R. serra (Maxim.) Hara roots. In addition, the highest content of total phenols was detected in 60% ethanol extract. Moreover, 60% ethanol extract also revealed the best DPPH racial scavenging capacity (better than rosemary extract, bamboo extract and ascorbyl palmitate), the best ABTS+ · scavenging capacity (better than rosemary extract), and the best Fe2+ chelating capacity (better than rosemary extract, bamboo extract and rutin).