The principles of aerosol sampling involve both a) the scientific factors which govern the way in which particles are transported from the air outside the sampler to a filter or sensing region inside it, and b) recognition of particle size-selective criteria which relate the act of sampling to the reason it is being carried out (e.g., assessment of health risk associated with inhalation). This paper reviews the state-of-the-art in both these areas, and goes on to mention some recent technical developments concerning practical sampling instruments.
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