STUDIES ON THE CHEMICAL-KINETICS IN FLOW- INJECTION ANALYSIS SYSTEM

Covection-diffusion model was used to study the chemical kinetics in f low injection analysis(FIA) system, Based on the expression of concent ration distribution of physical dispersion of sample without chemical reaction, the expressions of concentration distribution of product in single-line FIA system with first-order and second-order chemical reac tion under certain conditions were derived by mathematical inductive m ethod, The analytical solutions are very simple so that they can be ap plied to simulate the produced curves with computer easily, The experi mental fact that double-humped peak occurred when sample volume is ver y large in second-order reaction system was interpreted by the results computer-simulated. In addition, other information concerning chemica l kinetics was discussed.