Abstract
Inhibitory effects of trace metal ions (Mn2+ and Fe3+) on the intensity of chemilumines-cence accompanied by oxidation of luminol with hydrogen peroxide in the presence of Fe (CN) 63-catalyst were compared with those for a luminol-H2O2-Cu2+ system. The chemiluminescent intensity for the Fe (CN) 63- system was smaller twentieth than that for the Cu2+ system. However, the decrease in the intensity due to the metal ions found for the Fe (CN) 63- system was below 10 % of that for the metal ion free solutions in the metal ion concentration range up to 1×10-6 mole 1-1 and above 10-5 mole 1-1 the decrease in the intensity seemed to be very smaller than that for the Cu2+ system. This luminol-Fe (CN) 63- system may be favorable to determination of H2O2 in clouds and rainwater containing relatively large amount of metal ions.
