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. 2020 Nov 25;8:608718. doi: 10.3389/fpubh.2020.608718

Table 4.

Overview of selected settings and results from the SEM/EDS analysis.

Sample EDS maps, # Resolution range [nm px−1] Analyzed area [μm2] Percentage of grid analyzed [%] Particles detected [#] Particle number density [μm−2]
PRS-O 5 8.9–20.8 5,005 0.07 37 0.0074
Grind1 5 14.6–21.5 5,564 0.08 21 0.0038
Grind2 5 9.4–14.6 3,399 0.05 354 0.1041