粗壮女贞苦丁茶提取物对油脂氧化的抑制作用

目的 研究以乙醇作为溶剂的粗壮女贞苦丁茶提取物在油脂氧化过程中的抑制作用.方法 以花生油为模型, 通过测定和比较其在贮藏过程中的过氧化值变化来评价提取物抑制油脂酸败的能力; 通过体外化学分析的方法测定提取物的自由基清除能力、脂质过氧化抑制能力和还原能力来探究其抗氧化能力; 最后通过测定其总酚和总黄酮含量, 并采用高效液...

Inhibition effect of Ligustrum robustum (Rxob.) Blume extract on the oxidation of oil

Objective The inhibition of Ligustrum robustum (Rxob.) Blume alcoholic extract (LRE) on the oxidation of oil was investigated. Methods By measuring and comparing peroxide value (POV), the inhibition of LRE on the oxidation of peanut oil was estimated. Then the free radical scavenging activity, lipid peroxidation inhibition, reducing power were determined by chemical analysis methods to investigate its antioxidant capacity. The total phenolic and flavonoids content of LRE were also determined, while HPLC-MS was used to identify its main active compounds. Results The result showed that LRE could reduce the POV increasing of oil, so as to inhibit the oxidation of oil during its storage. Moreover, LRE showed the remarkable free radical scavenging activity, lipid peroxidation inhibition ability and reducing power, which might be attributed to its high content of total phenols (126.9 mg gallic acid equivalent/g extract) and flavonoids (135.6 mg quercetin equivalent/g extract). Furthermore, Ligurobustoside B was identified as the main active compound of LRE and the content is up to 765.83 mg/g LRE, which might contribute to the antioxidant activity of LRE in oil during the storage. Conclusion LRE can effectively inhibit oxidation of oil , which shows the potential value in the processing and storage of oil.