Superoxide(O2-) is a reactive free radical that rapidly undergoes disproportionation to hydrogen peroxide and oxygen. This property makes preparation of superoxide standard for instrument calibration difficult. McDowell et al. (1983) showed photolysis of ketone and alcohol as a convenient method to generate superoxide through triplet and radical intermediates reacting with molecular oxygen. This study expands on this past work and investigates detailed mechanism of the reaction.
Ong, T. C. and King, D. W., "Photochemical Production of MicromolarSuperoxideStandards in Aqueous SolutionT" (2007). Undergraduate Research Symposium (UGRS). 32.