title: Uncertainty in particle counting and sizing procedures.
abstract: A method is described for calculating confidence intervals for particle or fiber concentration, and for dust collector penetration. The span of the interval depends upon the value of fiber concentration or collector penetration reported and upon the number of particles or fibres counted.
mesh_terms: D001194:Asbestos / Q000032:analysis; D004391:Dust / Q000032:analysis; D005374:Filtration; D005740:Gases / Q000032:analysis*; D008722:Methods; D010316:Particle Size; D013223:Statistics as Topic
chemical_list: D004391:Dust; D005740:Gases; D001194:Asbestos