Table 1 Nanoparticle concentrations and MMAD values during 90-day exposure

NP concentration, required (mg/m³)

0.1

0.3

1.0

3.0

50.0

NP concentration, measured (mg/m³ ± SD)^a

0.12 ± 0.04

0. 33 ± 0.09

1.06 ± 0.16

3.04 ± 0.30

48.82 ± 4.52

MMAD (μm ± GSD)^b

0.71 ± 3.59

0.63 ± 3.83

0.68 ± 4.23

0.79 ± 3.50

2.95 ± 2.43