A novel method for the determination of trace naphthols was proposed based on naphthols, potassium bromate and pyronine Y in dilute sulfuric acid medium can react to form ion-association complexes, which not only resulted in the changes of the three-dimension fluorescence spectra, absorption spectra and the quenching of fluorescence, but also resulted in the great enhancement of resonance light scattering (RLS). The characteristics of RLS spectra, the effective factors and optimum conditions of reaction were studied. It was found that the enhanced intensity of RLS at 396 nm was proportional to...
