Characterization and Quantification of Particle-Bound Criegee Intermediates in Secondary Organic Aerosol.

ABSTRACT: The ozonolysis of alkenes contributes substantially to the formation of secondary organic aerosol (SOA), which are important modulators of air quality and the Earth's climate. Criegee intermediates (CIs) are abundantly formed through this reaction. However, their contributions to aerosol particle chemistry remain highly uncertain. In this work, we present the first application of a novel methodology, using spin traps, which simultaneously quantifies CIs produced from the ozonolysis of volatile organic compounds in the gas and particle phases. Only the smallest CI with one carbon atom was detected in the gas phase of a β-caryophyllene ozonolysis reaction system. However, multiple particle-bound CIs were observed in β-caryophyllene SOA. The concentration of the most abundant CI isomer in the

SUBMITTER: Campbell SJ 

PROVIDER: S-EPMC9494744 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature