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Table 2 Predicted lung burden and relationship to human equivalence

From: Carbon nanotube dosimetry: from workplace exposure assessment to inhalation toxicology

Exposure Total lung burden per day (ng) Alveolar lung burden per day (ng) Total alveolar burden (μg) Alveolar lung burden compared to human exposed at 10 μg/m 3for 8 h
Daily (cumulative)
5 mg/m3 for 5 h/d for 19 d 2340 1970 37.43 1000 days (76 years)
0.5 mg/m3 for 5 h/d for 19 d 234 197 3.74 100 days (7.6 years)
0.5 mg/m3 for 0.5 h/d for 19 d* 23.4 19.7 0.37 10 days (0.76 years)
  1. *Mice were exposed to air for 4.5 h prior to 0.5 h of MWCNT to maintain consistency of total exposure time.