Figure 2.
Particle size distribution of aerosolized antioxidants. Cascade impactor samples were collected from the inhalation exposure plenum and analyzed using SigmaPlot software (see the online supplement for additional information). Particle size distribution is presented as mass median aerodynamic diameter (MMAD) and geometric SD (GSD) (both in microns). d ln dae, the change of the natural log of the aerodynamic equivalent diameter of the particles collected; d M/Mo, the change of mass fraction of particles collected on each stage of the impactor; Mo, total particle mass collected. Shown are results of a typical experiment that was repeated nine times with identical results.