环己酮Vc缩酮和环己酮异Vc缩酮清除自由基能力的研究  

Study on the free radical scavenging activity of cyclohexanone L-ascorbic acid ketal and cyclohexanone D-isoascorbic acid ketal

作　　者：陈宗保[1] 郑大贵[1] 余衍文[2] 肖竹平[1] 

机构地区：[1]上饶师范学院江西省普通高校应用有机化学重点实验室,江西上饶334001 [2]南昌大学化学系,江西南昌330047

出　　处：《食品工业科技》2009年第5期106-108,共3页Science and Technology of Food Industry

基　　金：江西省普通高校重点实验室科技计划项目(赣教技字[2006]302号)

摘　　要：用分光光度法研究了环己酮VC缩酮和环己酮异VC缩酮清除羟基自由基、超氧阴离子自由基和DPPH·自由基的能力,并与VC、异VC和TBHQ清除相应自由基的能力进行了比较。结果表明,VC和异VC衍生为相应的环己酮缩酮后,清除上述三种自由基的能力保持不变或有所提高;当受试物的摩尔浓度相同时,环己酮VC缩酮和环己酮异VC缩酮对羟基自由基和超氧阴离子自由基的清除能力略比TBHQ强,对DPPH·自由基的清除能力略比TBHQ弱。The scavenging activity of cyclohexanone L-ascorbic acid ketal and cyclohexanone D-isoascorbic acid ketal on hydroxyl free- radical （ · OH）, superoxide anion free- radical （ O2^-· ） and DPPH · free- radical were studied and compared with that of L-ascorbic acid, D-isoascorbic acid and TBHQ by spectrophotometry.lt was found that both cyclohexanone L-ascorbic acid ketal and cyclohexanone D-isoascorbic acid ketal had significant scavenging effects on · OH, O2^- · and DPPH · .Cyclohexanone L-ascorbic acid ketal and cyclohexanone D-isoascorbic acid ketal had almost the same scavenging activity as L-ascorbic acid and D-isoascorbic acid, respectively.The scavenging activity of cyclohexanone L-ascorbic acid ketal and cyclohexanone D-isoascorbic acid ketal on · OH and O2^- · was stronger than that of TBHQ, but little weaker than that of TBHQ on DPPH · , when the molar concentration of the tested samples was the same.

关 键 词：环己酮VC缩酮 环己酮异VC缩酮 羟基自由基 超氧阴离子自由基 DPPH·自由基 

分 类 号：TS201.2[轻工技术与工程—食品科学]