阻抑乙基橙褪色动力学光度法测定痕量苯酚  

Kinetic spectrophotometric determination of trace phenol based on inhibitory reaction of ethyl orange

作　　者：李艳霞[1] 朱文平[1] 李俐俐[2] 杨旭东[1] 

机构地区：[1]周口师范学院化学化工学院,河南周口466000 [2]周口师范学院生命科学与农学学院,河南周口466000

出　　处：《化学研究与应用》2015年第2期195-198,共4页Chemical Research and Application

基　　金：河南省科技攻关项目(122102310368)资助;河南省高等学校青年骨干教师资助计划项目(2012GGJS-182)资助;周口师范学院实验室开放重点项目(K2014)资助

摘　　要：在稀盐酸介质中,苯酚的存在对溴酸钾氧化乙基橙褪色反应有很强的抑制作用。本文利用光度法监测反应过程中乙基橙浓度的变化,并建立了苯酚-溴酸钾-乙基橙体系阻抑动力学光度法测定苯酚含量的方法。在选定条件下,方法的线性范围是0.008μg·m L-1-0.28μg·m L-1,检出限为0.00019μg·m L-1.In a dilute hydrochloric acid medium,trace phenol showed strong inhibitory effect on the fading reaction of ethyl orange oxidized by potassium bromate. In this paper,the change of ethyl orange concentration in inhibitory reaction was monitored by spectrophotometry,and based on this a new method for the determination of trace phenol by inhibitory kinetics spectrophotometry in phenol-KBr O3-ethyl orange system was established. The detection limit was 0. 00019 μg·m L-1and the linear range was 0. 008 ~ 0. 28μg·m L-1.

关 键 词：苯酚 阻抑反应 乙基橙 动力学光度法 

分 类 号：O657.32[理学—分析化学]