Norm

NEN-EN 14907:2004 Ontw. en

Luchtkwaliteit - Gravimetrische referentiemethode voor de bepaling van de PM2.5 massa fractie van zwevende stof in de buitenlucht

  • Deze norm is ingetrokken sinds 27-09-2005

29,20

Over deze norm

Status Ingetrokken
Aantal pagina's 32
Commissie Werkplek- en buitenluchtmetingen
Gepubliceerd op 01-04-2004
Taal Engels
This standard describes a reference method for determining the PM2,5 mass concentration of suspended particulate matter in ambient air by sampling and weighing the particulate matter on filters. Measurements are made over a sampling period of about 24 hours, and, in line with the Directive, are expressed as µm/m3, where the volume of air is the volume at ambient conditions near the inlet at the time of sampling, ie not corrected to standard temperature and pressure. The range of applicationh of the standard is from 1 µm/m3 (i.e. the lower detection limit of the reference measurement method expressed as its uncertainly) up to at least 120 µm/m3 (i.e. the maximum concentration level observed during the field study undertaken by CEN/TC 264/WG 15 to validate the standard). The equivalence procedure in Annex A specifies two approaches, depending on whether the candidate method differs slightly or fundamentally from the standard method. In the former case, involving only slight differences from the standard method ("variations on a theme") Annex A provides a restricted procedure to compare only the pertinent differences, instead of a full field test. This part of the Annex serves to give practical guidance for determining equivalence for measurement methods commonly used in monitoring networks, and includes examples of common variations to the standard method, such as different filter storing procedures. In the latter case, involving a full set of field tests, the procedure serves to determine equivalence only within the range of conditions under which the field tests are carried out. The equivalence can be shown to hold for conditions prevailing within European countries by carrying out the field test in situations covering a suitable range of relevant ambient parameters (such as concentration and composition of the suspended particulate matter, temperature, and humidity).

Details

ICS-code 13.040.20
Nederlandse titel Luchtkwaliteit - Gravimetrische referentiemethode voor de bepaling van de PM2.5 massa fractie van zwevende stof in de buitenlucht
Engelse titel Ambient air quality - Reference gravimetric measurement method for the determination of the PM2,5 mass fraction of suspended particulate matter
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