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化学振荡是指在反应过程中某种形体的浓度随时间发生周期性变化的现象。Belousov首先报道了均相化学振荡反应,Prigogine的耗散结构理论为振荡反应提供了理论基础,至此,化学振荡引起人们的极大兴趣。本文在化学振荡理论的基础上,利用反映振荡过程中某种形体浓度大小的电位值随时间周期性变化的关系,提出了一种新的定性定量分析方法——化学振荡计时电位法。该法是利用振荡参数(诱导期、振荡周期、振荡寿命)与振荡体系某一物质起始浓度的依赖关系对该物质进行分析的。实验发现,在H_2SO_4—LB_rO_3—phenol非催化振荡体系中,振荡周期(Tp)的对数与苯酚起始浓度的对数在苯酚浓度为8.00×10~(-2)mol/L的范围内成线性关系,线性相关系数为0.998。将该法用于废水中苯酚含量的测定,回收率达97.7％～108.2％。本文还提出了振荡反应的机理和定量分析的依据。
Chemical oscillation refers to the phenomenon that a certain body’s concentration changes cyclically with time during the reaction. Belousov firstly reported the homogeneous chemical oscillatory reaction, and the dissipative structure theory of Prigogine provided the theoretical basis for the oscillatory reaction. At this point, chemical oscillations have drawn great interest. Based on the theory of chemical oscillation, a new qualitative and quantitative analysis method, chemical oscillatory chronopotentiometry, is proposed based on the relationship between the potential value of a certain body concentration and its periodicity in time. The law is to use the oscillation parameters (induction period, oscillation period, oscillation life) and oscillation system of a substance starting concentration dependence of the material analysis. It was found that the logarithm of the oscillation period (Tp) and the initial phenol concentration in the H_2SO_4-LB_rO_3-phenol system were in the range of 8.00 × 10 -2 mol / L Linearity, linear correlation coefficient of 0.998. The method for the determination of phenol in wastewater, the recovery rate of 97.7% ~ 108.2%. This paper also put forward the mechanism of oscillating reaction and the basis of quantitative analysis.