基于ESR光谱技术检测食品中自由基的研究进展

摘要

Free radicals are formed as the highly reactive intermediates during the process of food oxidation.Theevaluation of free radicals is used to assess the oxidation intensity of food matrix.The technology of Electron spin resonance (ESR) can provide the structural information of these free radicals.The paper introduced the application of ESR technology in different food systems.The effects of ESR were analyzed in detecting the free radicals and in predicting the oxidation stability of food.ESR technology could provide theory evidence for tracking and evaluating the free radical,and could be applied to predict the oxidation stability of food.%自由基是食品在发生氧化过程中形成的高度反应性中间体,针对食品体系中自由基的检测可以用来评价食品的氧化程度.电子自旋共振技术(Electron Spin Resonance,ESR)可以提供有用的结构信息使自由基被识别,ESR已成功检测不同食品中存在的自由基.本文介绍了ESR技术在不同食品体系中检测自由基的应用,分析了自旋捕获在ESR检测食品中自由基的效果,阐述了ESR检测技术在预测食品氧化稳定性方面发挥的作用.ESR技术可以为食品体系中自由基的跟踪、评定及食品氧化稳定性的预测提供理论依据.