Using surface-active agents in bulk oils is an emerging method to increase antioxidant activity. This research aimed to investigate the effect of adding polyglycerol-polyricinoleate (PGPR) — as an improvement agent of interfacial activity — on the antioxidant activity of quercetin in bulk oil. A kinetic regime was obtained using peroxide test data, and various kinetic parameters were calculated employing a sigmoid-linear model. The oxidation rate constant in the presence of quercetin (5.294 mmol L) and PGPR was 1.02 meq kg min, which decreased by 17.7% compared to the basic state. The antioxidant activity of quercetin was enhanced to 38.82, while the synergistic effect of PGPR on the inhibitory function was 35.69%. The PGPR addition improved the interfacial action of quercetin and modified its mechanisms of hydrogen donating and electron transfer. This improvement was accompanied by a decrease in the participation of the quercetin molecule and its radical in the side reactions of oxidation.

中文翻译：

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槲皮素在本体油超分子氧化中的抗氧化功能：聚甘油聚蓖麻油酸酯在传质网络中的作用

在散装油中使用表面活性剂是提高抗氧化活性的新兴方法。本研究旨在研究添加聚甘油聚蓖麻油酸酯（PGPR）作为界面活性改进剂对散装油中槲皮素的抗氧化活性的影响。使用过氧化物测试数据获得动力学状态，并使用S形线性模型计算各种动力学参数。槲皮素（5.294 mmol·L）和PGPR存在下的氧化速率常数为1.02 meq kg·min，与碱性状态相比下降了17.7%。槲皮素的抗氧化活性增强至38.82，而PGPR对抑制功能的协同作用为35.69%。 PGPR的添加改善了槲皮素的界面作用并改变了其供氢和电子转移机制。这种改善伴随着槲皮素分子及其自由基参与氧化副反应的减少。