D-异抗坏血酸棕榈酸酯（IP）的抗氧化特性研究

Study on antioxygenic activity of D-isoascorbyl palmitate synthesized by lipase

摘要: 考察了酶法合成的D-异抗坏血酸棕榈酸酯（IP）在模拟体系和食用油中的抗氧化能力,并和常用抗氧化剂进行了对比。结果表明:IP的抗氧化能力呈一定的剂量效应关系;与L-抗坏血酸棕榈酸酯（AP）、特丁基对苯二酚（TBHQ）、叔丁基对甲氧酚（BHA）及叔丁基对甲苯酚（BHT）相比,IP具有更强的羟基自由基清除能力和还原能力,但清除超氧阴离子及DPPH·自由基方面,略低于TBHQ;在油脂加速氧化实验中,IP能够显著抑制大豆油和菜籽油的氧化酸败。

Abstract: D- isoascorbyl palmitate( IP) was synthesized with lipase- catalyzed method and its antioxidant activity was evaluated in model systems and food oil systems compared with that of BHT( butylated hydroxytoluene),BHA( butylated hydroxyanisole) and TBHQ( tert- butyl hydroquinone). The results showed that IP had the higher scavenging effect on hydroxyl radical and reducing power compared with other tested antioxidants while it had slight lower superoxide anion and DPPH· scavenging powers than those of TBHQ.In the grease accelerated oxidation,IP showed significantly inhibited effect on oil rancidity.