Long-duration oscillations of chemiluminescence during the amino-carbonyl reaction in aqueous solutions

The Maillard reaction between carbonyl and amino compounds in aqueous solut ions at room temperature was shown to be accompanied by long-duration perio dic and aperiodic photon emission oscillations. Ascorbate and transition me tal ions in micromolar concentrations had substantial influence on the kine tics of chemiluminescence, which was evidence of the important role played by chain oxidation processes in the appearance of oscillatory chemiluminesc ence. The arising of oscillations and their duration and amplitude depended on the content of oxygen and the rate of its diffusion, the compositions a nd concentrations of the initial reagents, pH, and the presence of transiti on metals and antioxidants.