Abstract
A kinetic spectrophotometric method for the determination of silver has been described, based on its catalytic effect on the oxidation of chromotropic acid with bromate. The rate of change in absorbance with respect to blank is measured spectrophotometrically at pH 1.7. The effect of pH and concentration of bromate, chromotropic acid and silver on the rate of reaction were investigated. At the optimized conditions the proposed method allows the determination of silver in the range of 2-10 mu/ml. The effect of different ions on determination of silver was examined and the method was applied for the determination of silver in a photographic film.