Esr spin trapping evidence for SO.-3 and .OH radicals in sulfite oxidation

Xianglin Shi, N. S. Dalal

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)103-115
Number of pages13
JournalResearch on Chemical Intermediates
Volume13
Issue number2
DOIs
StatePublished - Jun 1990

ASJC Scopus subject areas

  • General Chemistry

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