Abstract
Two types of oscillating chemiluminescence are observed when luminol is added to the oscillating system H202-KSCN-CuS04-NaOH.Narrow bursts of light,with intensity proportional to the concentration of luminol,occur at the same time as the sharp increase in the concentration of a copper peroxide complex that is a key species in the oscillation of the luminol-free system. A second set of broad,low intensity oscillations is apparent at luminol concentrations below10-4M. These are ascribed to the slower reaction of luminol with superoxide. A skeleton mechanism for the action of luminolis proposed, but testing it will require refinement of the mechanism of the H202-KSCN-CuS04-Na0H oscillator.