顺序注射催化动力学光度法测定废水中的痕量酚

Catalytic Kinetic Spectrophotometric Determination of Phenols By Sequential Injection Analysis

在硫酸介质中 ,利用酚催化溴酸钠氧化花青的反应 ,联用顺序注射技术建立了顺序注射催化动力学光度法测定废水中痕量酚的新方法。方法的线性范围 0 .4～ 3.5mg/L ,检出限 0 .1mg/L。该法测定快速简便 ,常见共存物干扰小 ,消耗试剂量小 ,减少了二次污染 ,用于工业废水中的痕量酚的测定 ,并与 4 氨基安替比林比色法对照 。

A sequential injection analysis-catalytic spectrophotometric method has been proposed for the determination of trace phenols. It is based on the catalytic effect of phenols for the oxidation of gallocyanin by sodium bromate in sulfuric acid medium. The detection limit for phenols is 0.1 mg/L. The linear range of the determination is 0.4similar to3.5 mg/L. The method has been used to determine trace phenols in waste water with satisfactory results compared with 4-aminoantipyrine method.