Electron spin resonanee (ESR) spin trapping experimenss have been carried out to investigate the mechanism of sulfite oxidation employing 5,5-dimethyl-1-pyrroine-1-oxide (DMPO) as a spin trap. The results show that sulfite autoxidation, catalyzed by Mn(II), involves not only the SO.-3 radicals but also the .OH radicals. An addition of H2O2 to the sulfite aqueous medium significantly increases the .OH radical formation. This result provides new clues to the chemical mechanism of the sulfite oxidation and the sulfite toxicity.
|Number of pages||13|
|Journal||Research on Chemical Intermediates|
|State||Published - Jun 1990|
ASJC Scopus subject areas
- Chemistry (all)