氟离子-乳酸-丙酮-Mn^(2+)-BrO_3^--H_2SO_4振荡反应及其在分析中的应用

The Chemical Oscillation Reaction of F^--Lactic Acid-Actone-BrO_3^--Mn^(2+)-H_2SO_4 and Its Analytical Application

氟离子对乳酸-丙酮-Mn^(2+)-BrO_3^--H_2SO_4化学振荡反应的周期和振幅有显著的影响,F^-的浓度在8.00×10^(-5)～1.00×10^(-3)mol·L^(-1)范围内与振荡反应周期的改变值△t_p和振幅的改变值△H均有良好的线性关系,是一线性范围宽、灵敏度高的动力学分析测试体系。获得振荡反应诱导期、周期的表观活化参数E_(in)、E_p分别为55.71 kJ·mol^(-1)、67.41 kJ·mol^(-1),探索了该振荡体系可能的反应机理。

The influence of F-on CH_3 CH (OH) COOH-CH_3 COCH_3-BrO_3^--Mn^(2+)-H_2SO_4 chemical oscillating reaction had been studied. △t_p and △H had good linear relationship with the fluoride over the range of 5.00×10^(-5)～1.00×10^(-3) mol·L^(-1). The apparent activation parameter of inductory phase (E_(in)) and oscillatory period(E_p) were obtained, E_(in)=55.71 kJ·mo1^(-1) and E_p =67.41 kJ·mol^(-1). The possible mechanism of the oscillating reaction with the presence of F^- had been discussed.