基于ESR和比色法的美拉德产物抗氧化活性对比研究Comparative Study on Antioxidant Activity of Maillard Reaction Products Based on ESR and Colorimetry
章银良,黄天琪,郭浩彬,王悦,王明雷,陈科宇
摘要(Abstract):
运用电子顺磁共振波谱法和比色法(酶标仪法、紫外分光光度计法),以DPPH自由基清除率为指标,探究MRPs抗氧化活性大小。通过DPPH标准曲线的建立可以得出,3种仪器都能很好地反映DPPH浓度的变化。单因素实验结果表明,反应时间以及在酸性和低温条件下测量结果基本保持一致。而料液比以及在碱性条件下测量结果有差异,这主要来源于MRPs样品自身OD值影响以及MRPs与DPPH反应后反应产物OD值的影响,且后者占据主要的干扰作用。通过均匀实验得出3种方法的准确性为:ESR法>紫外法>酶标仪法,且ESR法优化条件更为合理,因此ESR法更适合美拉德反应MR条件的优化。
关键词(KeyWords): 电子顺磁共振波谱法;酶标仪法;紫外分光光度计法;美拉德反应产物;DPPH自由基;抗氧化
基金项目(Foundation): 河南省科技攻关项目(182102110094)
作者(Author): 章银良,黄天琪,郭浩彬,王悦,王明雷,陈科宇
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