Quantitative measurements of hydroperoxy and alkylperoxy radicals in gas-phase oxidation reactions from overlapping electron paramagnetic resonance spectra

Abstract

Two numerical methods are presented for the analysis of overlapping electron spin resonance spectra of peroxy radicals obtained by freezing. One is devoted to the determination of a simple lineshape parameter and the other uses a data collecting and processing system and a least-squares fitting treatment. Examples are provided for quantitative measurements of peroxy species obtained during gas-phase oxidation of hydrocarbons and heterogeneous decomposition of hydrogen peroxide.