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Table 6 Comparisons of nanoparticle collection via human (10 L/min) and rat (0.28 L/min, Sprague Dawley of 400 g) nasal olfactory (ambient nanoparticle concentration: n particles/L for each size)

From: Correlation of regional deposition dosage for inhaled nanoparticles in human and rat olfactory

Particle Diameter (nm)  
  Total Collection Rate: (#/min) x n
Human Rat Rat/Human Ratio
1 0.232 0.00008 0.00035
2 0.221 0.0028 0.013
3 0.154 0.0088 0.057
5 0.081 0.0165 0.203
20 0.013 0.0082 0.633
50 0.003 0.0024 0.811
  Olfactory Surface Collection Rate: (#/min/mm2) x n
Human (x 1E-6) Rat (x 1E-6) Rat/Human Ratio
1 110.6 0.06 0.00057
2 105.4 2.15 0.02
3 73.4 6.80 0.09
5 38.6 12.74 0.33
20 6.2 6.36 1.03
50 1.4 1.88 1.31
  Collection Rate Per Body Mass: (#/min/kg) x n
  Human (x 1E-4) Rat (x 1E-4) Rat/Human Ratio
1 26.36 2.03 0.077
2 25.11 69.4 2.77
3 17.5 220.0 12.6
5 9.20 412.0 44.8
20 1.48 205.9 139.4
50 0.34 60.8 178.4