Photobleaching of Eosin-Y and Erythrosine using Hexacyanoferrate(II)

Abstract

The photobleaching of dyes [Eosine – Y and Erythrosine] were carried in the presence of potassium hexacyanoferrate (II) and progress of the reaction was observed spectrophotometrically. The effects of various operating variables like pH, concentration of dyes and potassium hexacyanoferrate (II) and light intensity on the rate of the reaction was also observed. It was observed that photobleaching of dyes follows pseudo-first order kinetics. A tentative mechanism has also been proposed for the photobleaching of dyes in presence of potassium hexacyanoferrate (II).