138功能与营养摘要：以茭白干和鲜茭白为原料,采用溶剂法得到茭白醇提物和水提物，分别用石油醚、乙酸乙酯、正丁醇溶剂对艾白醇提物进行萃取测定茭白提取物及各溶剂萃取物中总多酚、总黄酮和总多糖含量,并分析其对DPPH、ABTS、羟基自由基的清除活性和总还原能力。结果表明：乙酸乙酯萃取物总多酚和总黄酮含量最高，鲜艾白醇提物总多糖含量最高；白提取物及各溶剂萃取物均检测出抗氧化活性，乙酸乙酯和正丁醇萃取物相对活性更高，可作为天然抗氧化剂；总多酚、总多糖含量与DPPH、羟基自由基清除能力呈极显著相关(P<0.01)。关键词：茭白提取物；总多酚；总黄酮；总多糖；抗氧化活性StudyontheantioxidantactivityofextractsofZizanialatifoliaandextractsfromdifferentsolventsSONGYa-jing,LINQian-jin,WUYan-xin,WANGZheng-liang,ZHANGYa-fen(CollegeofLifeSciences,ChinaJiliangUniversity,Hangzhou310018,Zhejiang,China)Abstract:TheethanolextractandwaterextractofZizanialatifoliawereobtainedbysolventmethodwithdryandfreshZizanialatifoliaasrawmaterials.TheethanolextractofZizanialatifoliawasextractedwithpetroleumether,ethylacetate,andn-butanolsolventsrespectively.Thecontentsoftotalpolyphenols,totalflavonoids,andtotalpolysaccharidesinZizanialatifoliaextractandsolventextractsweredeter-mined,andtheirscavengingactivityonDPPH,ABTS,andhydroxylfreeradicalsandtotalreducingabil-itywereanalyzed.Theresultsshowedthatthecontentoftotalpolyphenolsandflavonoidsintheethylac-etateextractwasthehighest,whilethecontentoftotalpolysaccharidesintheethanolextractoffreshZi-zanialatifoliawasthehighest.TheextractsofZizanialatifoliaandvarioussolventsshowedantioxidantactivity,whiletheextractsofethylacetateandn-butanolshowedhigherrelativeactivityandcouldbeusedasnaturalantioxidants.ThecontentoftotalpolyphenolsandpolysaccharideswashighlysignificantlycorrelatedwithDPPHandhydroxylradicalscavengingability(P<0.01).Keywords:Zizanialatifoliaextract;totalpolyphenols;totalflavonoids;totalpolysaccharides;antioxi-dantactivity中图分类号：TS201.2菱白是我国第2大水生蔬菜,经济效益显著,是蔬菜中的佳品。菱白营养丰富，被誉为“水中人参”,有着不菲的药用价值["]。研究发现,菱白提取物具有抗...
