金樱子与葡萄皮中原花青素的抗氧化活性比较

摘要

Proanthocyanidins were extracted and purified from Rosa laevigata and grape skin.The antioxidant activities of purified proanthocyanidins were investigated by testing scavening effects of· OH,O2-·,NO2-and against the peroxidation of oils.The results showed that at the same proanthocyanidin concentration of 0.5 g/L,the scavenging rate to · OH,O2-· and NO2-was 98.32 ％,95.93 ％,96.39 ％ of proanthocyanidins from R.laevigata,and 42.21％,24.42 ％,38.51％ of proanthocyanidins from grape skin,respectively.The peroxide value of oil was 0.098 and 0.103 mmol/kg for proanthocyanidins from R.laevigata and grape skin,respectively.The results indicated that purified proanthocyanidins from R.laevigata possessed better antioxidant activity than those from grape skin.%从金樱子和葡萄皮中提取原花青素并进行纯化,比较了两种纯化液对羟基自由基(·OH)、超氧阴离子自由基(O2-·)和亚硝酸盐(NO2-)体系的清除作用以及对油脂氧化体系的抑制作用.结果表明,当质量浓度为0.5 g/L时,金樱子中原花青素对·OH、O2-·及NO2的清除率分别是98.32％、95.93％、96.39％,而葡萄皮中原花青素对·OH、O2-·及NO2-的清除率分别是42.21％、24.42％、38.51％,金樱子和葡萄皮中原花青素对植物油的过氧化值分别为0.098和0.103 mmol/kg,表明金樱子中的原花青素抗氧化效果均强于葡萄皮中的原花青素.