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Chemical characterization of chamber-generated isoprene SOA: (A) GC/EI-MS total ion chromatogram (TIC) and (B) UPLC/(−)ESI-HR-QTOFMS extracted ion chromatograms (EICs) at m/z 198.99180, 215.02310, and 231.01801 corresponding to the MAE-, IEPOX-, and ISOPOOH-derived organosulfates, respectively.
