Abstract
Four commercially available batch-type bioaerosol samplers, which collect time-integrated samples in liquids, were evaluated. Sampling efficiency was characterized as a function of particle size using near-monodisperse polystyrene spheres (sizes of 1–5 μ m) and oleic acid droplets (3–10 μ m). Results show the sampling efficiency of AGI-30 impingers range from 4–67% for particle sizes of 1 to 5.1 μ m with significant variations between units; those of SKC BioSampler impingers range from 34–105% for particle sizes from 1 to 9 μ m; those of a batch-type wetted wall cyclone with compensation for evaporation (BWWC-EC) range from 5 to 65% for particle sizes 1 to 10 μ m; and, those of a batch-type wetted wall cyclone with no evaporation compensation (BWWC-NC) range of 55 to 88% for particle sizes of 1–8 μ m. Retention efficiency was measured for 1 and 10 μ m polystyrene spheres. For the AGI-30 and BWWC-EC, the retention efficiency of 1 μ m particles after 1 h was less than 30%, while that of the SKC BioSampler w...
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