Abstract
Titanium(III) and iron(II) are shown to stimulate luminol chemiluminescence in the absence of added oxidant. Down to 10
−9 M titanium can be determined. Both metal ions also produce chemiluminescence when injected into 0.1 M carbonate buffer (pH 10.4), allowing >10
−6 M of each to be determined. The intensities are greater when the solutions have been deoxygenated by a stream of nitrogen, and when rhodamine B is used as a sensitizer.