Fig. 3: The time series of chamber data in isoprene-only and toluene-only experiments.
From: Unraveling secondary organic aerosol formation from isoprene and toluene mixture

The time series of the volatile organic compound (VOC) decay (a), secondary organic aerosol (SOA) mass concentration (b), geometric mean diameter (GMD) (c), SOA factors (d), and their ratios (e) in the isoprene- (ISO, left) and toluene-only (TOL, right) experiments using ammonium sulfate (AS). Note that the SOA factors were normalized by sulfate.