摘要
基于在稀硫酸介质中，微量有机物乙二胺四乙酸（ＥＤＴＡ）对溴酸钾氧化偶氮氯膦Ⅲ褪色的新指标反应具有强烈的催化作用，提出了催化动力学光度法测定微量ＥＤＴＡ的方法。其灵敏度为６１１×１０－７ｍｏｌ／Ｌ，线性范围为４０×１０－６～１０×１０－４ｍｏｌ／Ｌ。
It is found that the oxidation process taking place between chlorophosphonazo Ⅲ and potassium bromate is catalysed by trace Ethylene Diamine Tetra Acetic acid (EDTA) in dilute sulfuric acid Based on this fact, a new kineticymethod for determing microamounts of EDTA is proposed The factors affecting the speed of indication reaction have been investigated Under the optimum conditions, the range of the determination of EDTA is 40×10-6～10×10-4 mol/L, the sensitivity of the method is 611×10-7mol/L The kinetics of the reaction was explored too
出处
《桂林工学院学报》
1997年第4期387-390,共4页
Journal of Guilin University of Technology
关键词
乙二胺四乙酸
偶氮氯膦Ⅲ
催化动力学
比色法
Ethylene Diamine Tetra Acetic acid
chlorophosphonazo Ⅲ
catalytic kinetic spectrophotometry
