Abstract
Aerosol sampling and sizing techniques from several different laboratories were compared. The participants agreed within ± 10% in defining count median diameter and geometric standard deviation when sizing a standard aerosol, and similar agreement with a more complex uranium oxide aerosol. Variation in count median diameter remained at ± 10% with eight different air samplers, whereas variation in geometric standard deviation increased to ± 15%. Calculated mass median diameter varied as much as 2.7 times for any one sampler and 6.7 times for all samplers.