邻菲咯啉-过氧化氢-铬黑T反应体系的光谱研究及其应用  

Spectrum Studies and Application of the Reaction System Phenthroline-EBT-H_2O_2

作　　者：周运友[1] 高峰[1] 佘世科[1] 卢琴[1] 王伦[1] 

机构地区：[1]安徽师范大学化学与材料科学学院,安徽芜湖241000

出　　处：《光谱学与光谱分析》2005年第9期1493-1495,共3页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(20375001)资助项目

摘　　要：在稀醋酸介质中,痕量邻菲咯啉对过氧化氢氧化铬黑T的褪色反应有明显的阻抑作用,据此建立了阻抑动力学光度法灵敏测定痕量邻菲咯啉的新方法,并讨论了该方法的动力学参数。在最佳实验条件下,其线性范围为0.003～0.08mg·L-1;检出限为4.0μg·L-1。该方法灵敏、快速、操作简便,用于水样中邻菲咯啉含量的测定,结果令人满意。A kinetic spectrophotometric method for the determination of trace phenthroline was proposed. The method is based on the inhibition of phenthroline to the discoloring reaction of EBT oxidized by hydrogen peroxide in the dilute acetic acid solution. At the same time, the kinetic parameters were studied in detail. Under optimum experimental conditions, the linear range is 0.003-0.08 mg· L^-1, and the detection limit is 4.0 μg· L^-1. The method is simple, rapid, and easy to operate. The method was applied to the determination of trace phenthroline in water samples with satisfactory results.

关 键 词：动力学光度法 阻抑反应 邻菲咯啉 铬黑T 

分 类 号：O657.2[理学—分析化学]