Analytical use of regenerative chemiluminescence in oscillatory reactions

The authors present a detailed study of the chemiluminescence of ruthenium tris-2,2'-dipyridy1 complex Ru(bipy)32 in the system potassium bromate-malonic acid-cerium (III, IV) sulfate. It is found that chemiluminescence of dipyridy1 ruthenium compounds in the BrO3-reverse arrow CH2(COOH)2-Ce (III) system enables the detection of the element at very low concentrations (down to about 2.10-10 M). The dependence of the maximum intensity on ruthenium concentration is linear over a wide range (2.10-10-10-4 M). The high intensity in this system is due to the repeated chemical excitation of the ruthenium ion during a single oscillation period