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.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1999年第3期261-265,共5页
Chinese Journal of Analytical Chemistry
关键词
甲醛
银基汞膜电极
伏安法
测定
Girard's试剂
Formaldehyde, Girard's reagents T, silver-based mercury film electrode, derivative reaction
