Fast autoxidation of unsaturated lipid films on indoor surfaces.

ABSTRACT: Organic films containing unsaturated lipids are widespread, yet their oxidation pathways with associated impacts on contaminant lifetimes and human exposure remain poorly explored under indoor environmental conditions. This study demonstrates that UVA radiation and radical exposure drive rapid autoxidation of thin films of methyl linolenate (ML) and canola oil (which contains polyunsaturated triglycerides), primarily producing organic hydroperoxides. For ML films this fast chemistry occurs at the same rate under entirely dark, genuine indoor conditions as it does when the films are exposed to significantly higher ^•OH radicals in a flow reactor. Both ^•OH and organic radicals are detected within the oxidized films, propagating fast autoxidation in dark indoor environmen

SUBMITTER: Wang X 

PROVIDER: S-EPMC11814283 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature