环境样品中痕量甲醛的催化荧光动力学分析  

Determination of trace formaldehyde in environmental samples by a catalytic kinetic spectrofluorimetric method

作　　者：樊静[1] 张涛[1] 郭会琴[1] 郭延辉[1] 

机构地区：[1]河南师范大学化学与环境科学学院河南省环境污染控制重点实验室,新乡453007

出　　处：《分析试验室》2009年第9期48-51,共4页Chinese Journal of Analysis Laboratory

基　　金：河南省科技攻关计划重点项目(072102320007);河南省环境污染控制重点实验室项目资助

摘　　要：基于在硫酸介质中，痕量甲醛能促进溴酸钾氧化吡咯红并使其荧光强度减弱的反应，建立了动力学荧光法分析测定痕量甲醛的新方法。研究了温度、时间，各种试剂浓度等条件对测定的影响。在最佳实验条件下，方法的线性范围是8～200ng／mL，检出限为6．1ng／mL。该方法用于环境水样、室内空气、食品中痕量甲醛的测定，并与乙酰丙酮分光光度法进行了对照，结果无显著性差异。A new fluorimetric method is established for the determinedation of trace formaldehyde. The fluorescence quenching of pyrrole-red can be fastened by formaldehyde for the oxidation of potassium bromate in sulfuric acid medium. It is shown that under the optimum experimental condition, the detection limit and linear range for formaldehyde measurement are 6.1 ng/mL and 8 - 200 ng/mL, respectively. This method has been applied to determining trace formaldehyde in foodstuffs and in air. The results thus obtained show good agreement with those determined by acetyl acetone method.

关 键 词：动力学荧光法 甲醛 吡咯红 环境水样 

分 类 号：O657.3[理学—分析化学]