Fig. 8: Coarse particle number concentration (APS, left y-axis) and particle mass concentration (DustTrak, right y-axis) measured in the emission zone (EZ) and the background zone (BZ).

The figure shows the measurements during weighing and mixing of the TiO2 NP powder during Study A. a Shows work task A2—day 1 and b shows work task A2—day 2.