Abstract
Mixed-surfactant vesicles, which have the possibility of controlling the reaction pathways, formed from aqueous mixtures of octyltrimethylammonium chloride and sodium dodecanoate, were evaluated for a chemiluminescence (CL) reaction medium by means of a batch method. The lucigenin CL based on the oxidation by superoxide was chosen as a model CL system. The lucigenin CL intensity was enhanced by a factor of 65 in mixed vesicles (pH 9.2) compared with no use of a surfactant. This enhancement was greater than those in other ordered surfactant aggregates, and thought to be caused by the increased CL quantum yield, which resulted from a change in the reaction pathway in the mixed vesicular medium. The present lucigenin CL system can be used for the CL determination of biological analytes under nearly neutral conditions.
