DPPH·法评价Vc、异Vc及其衍生物的抗氧化性能  

Evaluation of antioxidant activity of L-ascorbic acid,D-isoascorbic acid and their derivatives by DPPH· assay

作　　者：郑大贵[1] 叶青[1] 叶红德[1] 余衍文[2] 

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》2008年第4期113-116,共4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[2005]301号,赣教技字[2006]302号)

摘　　要：用DPPH.法评价了Vc、异Vc、辛醛Vc缩醛、辛醛异Vc缩醛、月桂酸Vc酯和月桂酸异Vc酯的抗氧化能力。结果表明,所有六种受试物清除DPPH.的能力随着浓度的增大而提高;摩尔数相等时,Vc与它的衍生物以及异Vc与它的衍生物清除DPPH.的能力基本相同;在受试物浓度低于1.397×10-4mol.L-1,并且浓度相同时,Vc及其衍生物比对应的异Vc及其衍生物具有更强的清除能力。The antioxidant activity of L-ascorbic acid, D-isoascorbic acid, L-ascorbyl octyl aldehyde acetal, D- soascorbyl octyl aldehyde acetal, L-ascorbyl Laurate and D-isoascorbyl Laurate in ethanol were investigated by scavenging 1 ,1-Diphenyl-2-picrylhydrazyl free radical （DPPH · ）. The results showed that all the six tested samples had good scavenging DPPH · activity. The same molar number of L-ascorbic acid and its derivatives showed almost the same scavenging DPPH · activity. When the concentration of samples was lower than 1.397 × 10^-4mol · L^-1, the activity of scavenging DPPH · of L-ascorbic acid or its derivatives was higher than that of D- isoascorbic acid or its derivatives.

关 键 词：VC 异VC 辛醛Vc 缩醛 辛醛异Vc缩醛 月桂酸Vc酯 月桂酸异Vc酯 DPPH.法 

分 类 号：TS202.3[轻工技术与工程—食品科学]