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. 2021 Oct 24;18(21):11172. doi: 10.3390/ijerph182111172

Figure 2.

Figure 2

Size distribution replicates determined by Optical Particle Counter, reporting average number concentrations (particle counts/liter) for each of the 20 dimensional bin spanning the range from 0.25 to 5.0 μm (particle diameter of the center of the bin, in micrometers). Three replicate cycles (16 size spectral acquisition each) are measured at the inlet (3 runs) and three cycles were acquired at the outlet of the aerosol transmission tube.