Abstract:Roles of water in the formation of secondary organic aerosol (SOA) from the irradiations of toluene-NO 2 and isoprene-NO 2 were investigated in a smog chamber. Experimental results show that the yield of SOA from toluene almost doubled as relative humidity increased from 5 to 85 %, whereas the yield of SOA from isoprene under humid conditions decreased by 2.6 times as compared to that under dry conditions. The distinct difference of RH effects on SOA formation from toluene and isoprene is well explained with o… Show more
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