Figure 1

Physicochemical analyses of particles collected from the office and welding place.
The particles were collected using two Micro-Orifice Uniform Deposit Impactors (MOUDI; MSP Inc., USA). The samples in the size between 1 μm and 1.8 μm were analysed using SEM and EDX. C, O, F, Al, Si, V, Cr, Mn, Fe, Co, Ni, Cu and Cd were determined in the blank, office and welding samples.