Measurement of Fine Dust Respirable Particles

Because of the relatively large amount of dust necessary for substance-specific analysis, stationary samplers capable of sampling large volumes of air have to be used to collect sufficient material for an accurate analysis. The already mentioned Gravikon VC 25, furnished with a fine-particle sampling head, is an example of a sampler for this task [6-109]. Like other fine dust samplers, this stationary device meets the requirements of the Convention of Johannesburg (see Section 2.10). 

For separation of the larger particles from the fine particle fraction, the zone with the fine particles has to be cut out by use of a filter cutter (see Fig. 6.73). In order to prevent errors due to particle agglomeration, the device can be furnished with an impactor. More details of this method can be obtained from the user s manual of the VC 25. 

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