催化动力学光度法测定痕量甲醛  

Catalytic Kinetic Spectrophotometric Determination of Trace Formaldehyde

作　　者：施冬冬[1] 陈灵燕[1] 郑云法[1] 

机构地区：[1]丽水学院,浙江丽水323000

出　　处：《广州化工》2013年第3期91-92,94,共3页GuangZhou Chemical Industry

基　　金：大学生科技创新项目(No:2012R429011)

摘　　要：基于在硫酸介质中,甲醛对氯酸钾氧化甲基橙的反应具有显著催化作用,建立了测定痕量甲醛的动力学光度法。在选定的条件下,该方法的线性范围为0.06～0.43 mg.L-1,线性回归方程为ΔA=0.8696C+0.0647(式中C为甲醛质量浓度,以mg.L-1表示)。将该方法应用于水样中痕量甲醛的测定,测定结果的相对标准偏差(RSD)均小于4.7(n=5),测得回收率在95%～106%之间,结果满意。Based on in a sulphuric acid medium, formaldehyde to potassium chlorate oxidation of methyl orange reac- tion had significant catalysis, and a determination method of trace formaldehyde dynamic photometric was established. Un- der the selected conditions, the linear range of 0. 06 -0. 43 mg · L^-1, the linear regression equation for AA = 0. 8696C ＋ 0. 0647 （ C ： mg of HCHO per L）. The method was applied to the determination of several water samples of trace form- aldehyde, calculated results were analyzed and the relative standard deviation （RSD） was less than 4.7 （ n = 5 ）, and the measured recoveries were 95% - 106%, with satisfactory results.

关 键 词：催化动力学光度法 甲基橙 氯酸钾 甲醛 

分 类 号：O657.32[理学—分析化学]