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  • Title: Kinetic analysis of the Fenton reaction by ESR-spin trapping.
    Author: Mizuta Y, Masumizu T, Kohno M, Mori A, Packer L.
    Journal: Biochem Mol Biol Int; 1997 Dec; 43(5):1107-20. PubMed ID: 9415820.
    Abstract:
    A quantitative analysis of hydroxyl radical (.OH) generated in the Fe(2+)-hydrogen peroxide reaction system was explored by a spin-trapping method using 5,5-dimethyl-1-pyrroline-N-oxide (DMPO) combined with electron spin resonance spectroscopy. Based on the numerical analysis of Fenton-related reactions, the reduction of DMPO-OH adduct from 1:1 stoichiometry prominent at high concentrations of Fe2+ was consistent with a reaction model in which a molar amount of hydrogen peroxide was reduced by two molar amounts of Fe2+. Furthermore, time-dependent decrease in DMPO-OH quantity, apparent at much higher concentration of Fe2+, was proved due to the reaction not with Fe2+ but with Fe3+.
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