溴酸钾氧化酚藏花红动力学荧光法测定痕量甲醛  

Kinetic Fluorimetric Determination of Trace Formaldehyde Based on Oxidation of Phenosafranine by Potassium Bromate

作　　者：赵青[1] 陈兰化[1] 

机构地区：[1]淮北师范大学化学与材料科学学院,安徽淮北235000

出　　处：《分析科学学报》2013年第5期726-728,共3页Journal of Analytical Science

摘　　要：在H2SO4介质中,痕量甲醛能显著地催化溴酸钾氧化酚藏花红的反应,使体系的荧光强度减弱,据此建立了动力学荧光法测定甲醛的新方法。在最佳实验条件下,方法的线性范围为8.0～400μg/L,检出限为3.1μg/L。该法简便、快速、选择性好,已用于环境水样中痕量甲醛的测定,其加标回收率在97.5%～103%之间,相对标准偏差为2.9%～3.4%。A new kinetic fluorimetric method for the determination of trace {ormaldehyde has been proposed,based on its obvious catalytic effect on the fluorescence quenching reaction of phenosafranine by oxidative effect of potassium bromate in sulfuric acid medium. Under the optimum conditions, the linear range of this method is 8.0-400 μg/L,and the detection limit is 3.1 μg/L. The method possesses several advantages including fast, simple and good selectivity, which has been applied to determination of trace formaldehyde in environmental water samples. The recoveries were 97.5%-103% ,and the relative standard deviation were 2.9%-3.4%

关 键 词：动力学荧光法 甲醛 酚藏花红 

分 类 号：O657.39[理学—分析化学]