[Catalysis kinetics-fluorescence analysis studies on Fe(III)-H2O2-furfural-7-amino-8-hydroxy-5-sulfo-quinoline...

This paper reports that hydrogen peroxide oxidized furfural-7-amino-8-hydroxy-5-sulfo-quinoline(F7A8Q5S) under the catalysis of Fe(III). Results indicated that the fluorescence of F7A8Q5S was weak, but that of the oxidation product was strong. The peak was at lambda ex/lambda em = 330/405 (nm). The calibration curve of Fe(III) is linear between 0.0-40.0 micrograms.L-1, and the determination limit is 4.68 ng.L-1. So a new catalysis fluorescence analysis method was set up for the determination of trace amounts of Fe(III), based on its catalytic effect on F7A8Q5S oxidized by H2O2. This proposed method has been successful applied to the determination of Fe(III) in alloy samples.