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对红景天超临界CO_2提取物抗氧化作用进行研究。采用二苯代苦味酰基自由基分析法、邻苯三酚自氧化法、过氧化氢检测法和过氧化值测定法,测定了红景天超临界CO_2提取物对二苯代苦味酰基自由基、超氧阴离子和羟基自由基的清除能力以及对油脂过氧化作用的影响。结果表明:红景天超临界CO_2提取物具有明显清除自由基的能力,对猪油,菜油有较强的抗氧化作用。
The antioxidation of supercritical CO_2 extract from Rhodiola was studied. Determination of diphenyl-picpic acyl radicals in supercritical CO 2 extracts of Rhodiola rosea by using dibenzothiophene acyl radical assay, pyrogallol autoxidation, hydrogen peroxide detection, and peroxide value determination. The scavenging ability of superoxide anion and hydroxyl radicals and the effect on lipid peroxidation. The results showed that the supercritical CO_2 extract of Rhodiola rosea had the ability to scavenge free radicals, and had a strong antioxidant effect on lard and vegetable oil.