Photometric and fluorimetric methods for the determination of bromate in bread

Abstract

Kinetic methods for the determination of bromate based on the oxidation of benzyl 2-pyridyl ketone 2-quinolylhydrazone are described. The initial reaction rate is linearly related to the bromate concentration with detection limits of 0.25–6.50 µg ml^–1 for photometric monitoring and 0.08–5.20 µg ml^–1 when the change in the fluorescence signal is measured. Under appropriate working conditions, the photometric method was applied satisfactorily to the determination of bromate in bread.