摘要
邻苯三酚在碱性溶液中的自氧化反应产生超氧阴离子自由基(O2-.)可迅速氧化灿烂绿褪色.香辛料提取物可以清除溶液中的O2-.,从而使溶液吸光度下降的程度降低,据此原理建立了一种测定香辛料对O2-.清除率的新方法.确定了体系最佳实验条件为pH 8.9,灿烂绿用量为0.7 mL,邻苯三酚用量为0.4 mL,反应时间15 m in.测得6种香辛料的提取液清除O2-.的效果,结果表明,清除能力排序为:胡椒>芹菜>姜>青椒>蒜>八角.
The self-oxidation of pyrogallol in basic solution can generate superoxide anion radical O-·2 that can quickly oxidize brilliant-green to fade.Extractives of spices may eliminate O-·2 in solution and then lower degree of decrease of absorbance in solution.Based on this principle,a new method was proposed to determine clearance rate of superoxide anion radical by spices.The optimal experimental conditions（pH： 8.9,brilliant-green： 0.7 mL,Pyrogallol： 0.4 mL,reaction time： 15 min） were determined.Clearance effects of six spices for O-·2 were determined.The results showed the sequence of clearance rates with peppercelerygingergreen peppergarlicaniseed.
出处
《闽江学院学报》
2009年第5期103-105,共3页
Journal of Minjiang University
基金
福建省教育厅科技规划项目(JB07170)
