Abstract
A study of the kinetic transformation of the insecticide carbaryl into its metabolite 1-naphthol in basic media at different temperatures is presented. The activation energy of the hydrolysis process has been calculated. A spectrophotometric and spectrofluorimetric method to determine the dissociation constant in the ground state of 1-naphthol, based on the changes in the absorption and fluorescence of its solutions with pH, has been established. The method permits the accurate determination of the p K a value of the metabolite. The utility of fluorescence spectroscopy in the determination of dissociation constants is also illustrated with the determination of the acidity constant of 1-naphthol in the excited state.
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