Abstract
Symmetric double-step potential (i.e., positive and negative potential) pulses with intermittent zero potential pulses at the oxide-covered aluminum electrode generates anodic and cathodic electroluminescence in an aqueous environment in the presence of potassium peroxodisulfate. Organic fluorescent compounds generate changes in the cathodic electroluminescence but not in the anodic emission: intensity is greatly enhanced and the spectrum of a fluorophor-enhanced electroluminescence becomes similar to the fluorescence spectrum of the fluorophor. The mechanism of the fluorophor-enhanced peroxodisulfate-induced cathodic electroluminescence is discussed. It is demonstrated by means of salicylic acid as the model fluorophor that this electroluminescence can be exploited to determine trace organic fluorescent compounds.
Published Version
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