Kinetic determination of aminopyrine by using the bifurcation point in Mn(II)-catalyzed B-Z oscillating chemical system

Oscillating chemical reactions are complex nonlinear systems, which can exhibit different dynamic regimes such as regular and irregular oscillations, as well as chaos under different conditions. Such sorts of behavior in chemical and biological systems offer many choices for application to analytical chemistry. So far, regular oscillating profiles have been applied widely for the determination of organic and inorganic substances by using an analyte pulse perturbation technique (APP) in a continuously stirred tank reactor (CSTR)[1,2]. The basic principle is that adding an analyte to an oscillating reaction to perturb the oscillating profiles (e.g., period and amplitude) first, then to calculate the relationship between the change of signal and the amount of analyte added. In other words, kinetic analytical methods are to study an ability of analyte to change kinetic paramJinzhang Gao*, Miao Guo, Jie Wang, Jie Ren, Wu Yang College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou-730070, (P. R.CHINA) E-mail : [email protected] Received: 16 December, 2008 ; Accepted: 21 December, 2008