新合成“哥腊”衍生试剂在甲醛的电分析化学中的研究  

Application of New Girard's Reagents to the Electroanalytical Chemistry of Formaldehyde

作　　者：邹永德[1] 陈永康[2] 莫金垣[1] 

机构地区：[1]中山大学化学系,广州510275 [2]香港浸会大学化学系

出　　处：《分析化学》1999年第3期261-265,共5页Chinese Journal of Analytical Chemistry

摘　　要：利用合成新的Girard＇s试剂T,使之与甲醛反应生成电活性的产物,在银基汞膜电极上还原来检测甲醛.对影响这一测定方法的各种因素进行了研究,指出了最佳的实验条件,探讨了衍生反应和电极过程.应用这一方法测定浓度为5.0×10^(-6)mol/L的甲醛,重现性良好,其RSD为3.05%(n=8);对浓度为20×10^(-7)mol/L的甲醛测定7次,其检测限为7.6×10^(-8)mol/L.此外,这一方法能同时测定甲醛和乙醛.对家居环境中的空气取样,进行了实际样品的检测.A new type of Girard' s reagent T was synthesized, which can react with formaldehyde to produce electroactive adduct. Reduction of these derivatives on silver-based mercury film electrode (SMFE) is possible and effective in indirect determination of formaldehyde. The experimental conditions and the electrode mechanism were discussed. Using this method for the determination of 5.0 × 10-6mol/L formaldehyde the relative standard deviation was 3.05% ( n = 8) and the detection limit was 7.6×10-8 mol/L formaldehyde. The real samples from house air were measured.

关 键 词：甲醛 银基汞膜电极 伏安法 测定 Girard's试剂 

分 类 号：O623.511[理学—有机化学] X511.02[理学—化学]