Fig. 2. Measured chemical species during the cleaning experiments.

(A) Primary VOC emissions, (B) ozone, (C) HO₂ and RO₂ radicals, (D) selected oxidation products, (E) particle number size distribution, and (F) size-integrated particle number concentrations. Gray shading corresponds to active periods of mopping and wiping during the cleaning events. The magenta line corresponds to a CO₂ injection, which was done to estimate the AER of the room. The particle diameter from 1.2 to 2.5 nm is the activation diameter measured by the nano Condensation Nucleus Counter (nCNC), and the particle diameter from 2.5 to 100 nm is the electrical mobility diameter measured by the Scanning Mobility Particle Sizer (SMPS) and NanoScan SMPS.