SOA formation from the O3-isoprene reaction: effect of radical scavenger

Abstract

To evaluate acurrate secondary organic aerosol (SOA) yield from the O3-isoprene reaction, a series of chamber experiments was conducted using different OH radical scavengers. The SOA yield obtained using cyclohexane as the scavenger was close to that obtained in the absence of scavenger, whereas the SOA yield obtained using CO as the scavenger was lower than that obtained in the absence of scavenger. The effect of radical scavenger is discussed not only from the results of SOA yield but also from the results of rate constant and SOA chemical composition.