甲醛-乳酸-丙酮-Mn^(2+)-BrO_3^-H_2SO_4振荡反应动力学分析研究

Kinetic Study on HCHO-Lactic Acid-Actone-BrO_3^--Mn^(2+)-H_2SO_4 Chemical Oscillation Reaction

甲醛对乳酸 丙酮 Mn2+ BrO-3 H2SO4化学振荡反应的诱导期tin有显著的影响,甲醛浓度的对数ln[HCHO]与诱导期倒数的对数ln(1/tin)有良好的线性关系,线性范围为5.0×10-8～1.0×10-3mol·L-1。在此浓度范围内,该体系是一重现性好,灵敏度高,操作简单的甲醛动力学分析测试体系。获得的诱导期、周期的表观活化参数Ein、Ep分别为64.7kJ·mol-1、65.0kJ·mol-1。

The influence of HCHO on (CH_(3)CH(OH)COOH-CH_(3)COCH_(3)-BrO^-_3-Mn^(2+)-H_(2)SO_(4)) chemical oscillation reaction has been studied. ln(1/t_(in)) had good linear relationship with ln[HCHO] in the concentration range of (5.0×10^(-8) ～ 1.0×10^(-3 )mol·L^(-1).) The apparent activation parameters of inductory phase(E_(in)) and oscillatory period(E_(p)) were obtained, E_(in )= 64.7 kJ·mol^(-1) and E_(p )= 65.0 kJ·mol^(-1). The possible mechanism of the oscillation reaction in the presence of HCHO has been discussed briefly.