A spectrofluorometric method for microdetermination of H2O2 has been develo
ped. The method is based on the oxidation of hydrogen peroxide with eerie i
on in acid solution and measurement of the fluorescence during titration of
the Ce(III) ions produced. The fluorescent species have excitation and emi
ssion maxims at 260 and 360 nm, respectively. The detection limit of measur
ement by this method was 0.1 ppm hydrogen peroxide.