Workplace Exposure to Titanium Dioxide Nanopowder Released from a Bag Filter System

Figure 6

Analysis of particle size distribution measured using the OPC: comparison of number-based particle size distribution (a and c) and mass-based particle size distribution (b and d). Panels (a) and (b) refer to the period including task 1, and (c) and (d) to the period including task 2.

(a)

(b)

(c)

(d)