| Oscillating chemical reaction as a typical phenomenon of non-equilibrium and nonlinear, has attracted the attention of researchers in recent years. The studies of oscillating chemical reaction could be divided into two major aspects: (1) designing new oscillating chemical reactions and elucidating the intricate mechanisms based on the chemical thermodynamics and kinetics, and (2) application of certain characteristics of oscillating chemical reaction in analytical determination. The present works are that the determinations of guanine, aniline and adenine have been performed by using the oscillating chemical reactions. In addition, the possible perturbation mechanisms were also discussed in brief.The review summarized the progress of oscillating chemical reactions, including the basic thermodynamic theory of oscillating chemical reaction and its occurrence conditions. Several commonly oscillating chemical reactions and their mechanisms were simply discussed. At last the perspective of chemical oscillation reactions was discussed, too.A simple and sensitive analytical method for the determination of guanine with the perturbation caused by different amounts of guanine on the B-Z oscillating chemical system, involving the Ce(IV)-catalyzed reaction between potassium bromate and malonic acid in an acidic medium was proposed. Results showed that a well linear relationship was existed between the change of oscillating period and the negative logarithmic concentration of guanine in the range of 2.5×10-81.4×10-4 mol·L-1, with a correlation coefficient being 0.9987. The detection limit of 2.5×10-9 mol·L-1 was also obtained. In addition, a possible perturbation mechanism was discussed briefly.The perturbation of adenine on NaSCN-CuSO4-H2O2 oscillating system was studied. Results showed that a well linear relationship between the change of oscillating period and the negative logarithm concentration of adenine was obtained in the range of 1.50×10-72.00×10-4 mol·L-1 with a detection limit of 2.51×10-8 mol·L-1 and a correlation coefficient 0.9974. At the same time, the possible perturbation mechanism was discussed in brief. A convenient method for the determination of aniline was established based on the perturbation of tartrate-acetone-Mn2+-KBrO3-H2SO4 double organic substrates oscillating chemical system. Under the optimum conditions, temperature was chosen as the control parameter to design the bifurcation point. Results showed that the system consisting of 3.5 mL 0.06 mol·L-1 tartrate, 4.0 mL 0.7 mol·L-1 H2SO4, 1.5 mL 1.5×10-4 mol·L-1 MnSO4, 4.0 mL 0.4 mol·L-1 acetone and 7.0 mL 0.05 mol·L-1 KBrO3 was very sensitive to the analyte at 33.5℃. A well linear relationship between the potential difference and the negative logarithm concentration of aniline was obtained to be in the range of 1.00×10-62.00×10-4 mol·L-1 with a detection limit of 2.50×10-7 mol·L-1. |
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