ASTM D6552 - 06(2016)

Standard Practice for Controlling and Characterizing Errors in Weighing Collected Aerosols


Status:
Gældende
Type:
Standard
Sprog:
Engelsk
Pris fra:
kr. 318,00

Beskrivelse

1.1 Assessment of airborne aerosol hazards in the occupational setting entails sampling onto a collection medium followed by analysis of the collected material. The result is generally an estimated concentration of a possibly hazardous material in the air. The uncertainty in such estimates depends on several factors, one of which relates to the specific type of analysis employed. The most commonly applied method for analysis of aerosols is the weighing of the sampled material. Gravimetric analysis, though apparently simple, is subject to errors from instability in the mass of the sampling medium and other elements that must be weighed. An example is provided by aerosol samplers designed to collect particles so as to agree with the inhalable aerosol sampling convention (see ISO 7708, Guide D6062, and EN 481). For some sampler types, filter and cassette are weighed together to make estimates. Therefore, if the cassette, for example, absorbs or loses water between the weighings required

Antal sider: 9

Internationale relationer :

ICS: 13.040.99 - Andre standarder vedrørende luftkvalitet

Varenummer: A003334