【摘要】 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、简便的流动注射停流 催化光度分析的新方法。该方法的线性范围为 0 .6 0～ 4.0 0mg/L ,检出限为 0 1mg/L ,进样频率为 34/h。 11次重复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。更多还原

【Abstract】 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.更多还原