废水中痕量酚的流动注射停流-催化光度法测定

基于在硫酸介质中痕量酚对溴酸钾氧化罗丹明B反应的催化作用，建立了测定痕量酚的快速、简便的流动注射流－催化光度分析的新方法。该方法的线性范围为0．60－4．00mg/L，检出限为0．1mg/L，进样频率为34／h。11次重得测定的相对标准偏差小于2．0％。该法用于废水中酚的测定，并与4－氨基安替比林比色法对照，结果满意。

Flow Injection-Catalytic Spectrophotometric Determinationof Trace Phenols Using Stopped-Flow Technique

A rapid and simple flow-injection-catalytic spectrophotometric method using stopped-flow technique for determination of trace phenols is described. This methods is based on the catalytic effect of phenols on the reaction of rhodamine B and potassium bromate in sulfuric acid medium. The optimal experimental conditions are obtained by using the controlled and weighed centroid simplex method. The linear range of the determination is 0.60～4．00 mg/L for phenols, and the detection limit is 0.1 mg/L with the sample throughput of 34/h. The relative standard deviation of eleven replicate measurements is less than 2.0%. It has been applied for the determiantion of phenols in waste water with satisfactory results