title: Antioxidant efficiency of polyhydric phenols in photooxidation of benzaldehyde.
abstract: An experimental system is described for the observation  of the kinetics of photochemically initiated oxidation reactions; this system is based on the measurement of oxygen consumption with a polarographic oxygen electrode. The photooxidation of benzaldehyde in dilute aqueous solution was examined and appears to conform to a free radical chain mechanism. The antioxidant efficiency of some polyhydric phenols was determined kinetically and found to be catechol greather than pyrogallol greater than hydroquinone greather than resorcinol greater than n-propyl gallate for the benzaldehyde photooxidation.
mesh_terms: D000975:Antioxidants; D001547:Benzaldehydes; D055598:Chemical Phenomena; D002621:Chemistry; D007700:Kinetics; D010084:Oxidation-Reduction; D010636:Phenols; D011312:Pressure; D012995:Solubility; D013696:Temperature
chemical_list: D000975:Antioxidants; D001547:Benzaldehydes; D010636:Phenols