摘要
本文对甲醛在醋酸-醋酸铵-乙酰丙酮底液中的极谱行为和电极反应机理进行了探讨,提出了用示波极谱法测定痕量甲醛的一种新方法。在上述底液中,于70℃恒温水浴中加热10min,甲醛与试剂的反应产物在单扫描示波极谱仪上产生一灵敏的吸附波,峰电位为-0.96V(vs.sCE)。在0.002～1.0μg/ml的范围内,峰电流与甲醛浓度呈线性关系,检测下限为0.002μg/ml。
The polarographic behavior of adsorptive wave of formaldehyde in a solution of acetic acid-ammonium acetate-acetylacetone has been studied. The product of formaldehyde reacting with ammonia and acety-lacetone has a sensitive adsorptive wave in the system with peak potential of -0. 96 V(vs. SCE). The peak current was linearly relative to the concentration of formaldehyde in the range of 0. 002-1 μg/ml. The detection limit was 0. 002 μg/ml. The method can be used for the determination of trace formaldehyde in indoor air with good selection.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1993年第7期804-807,共4页
Chinese Journal of Analytical Chemistry
关键词
甲醛
示波极谱
吸附波
Formaldehyde, Oscillographic polarography, Adsorptive wave.
