摘要：In order to compare sampling efficiencies of total and inhalable dust methods, three airborne dust sampling systems , 7-Hole sampler , close and open face filter cassette were compared side-by-side , as stationary and for the personal samplers , in a wood working industry to evaluate their relative efficiency. A total of 162 samples were collected. The study of particle size distribution by cascade impactor indicated that the particles smaller than 4.7 and 11 comprise about 13% and 30% of biology total dust respectively and therefore about 70% of particles are greater than 11. The 7-Hole gave a higher dust concentration measurement than open face and close face filter cassettes, in all processes, P11, compared to the open face and close face filter cassettes. Open face and close face filter which were expected to give equivalent results measured statistically equivalent dust concentrations.
关键词：Total dust; Inhalable dust; 7-Hole samplers; Open face samplers; Close face samplers
