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Table 3 Aerosol concentrations and particle size distributions of BaSO 4 NM-220

From: Biokinetics and effects of barium sulfate nanoparticles

Duration of exposure

Targeted concentrations (mg/m3)

Measured concentrations (mg/m3)

MMAD (μm)/GSD mean

Particle count concentration (particle/cm3)

Particle count median diameter (nm)

4 weeks

50

46.2 ± 5.9

2.3/2.0

92752

326

13 weeks

50

50.1 ± 5.6

1.9/2.1

77992

304