Over deze norm
|Commissie||Werkplek- en buitenluchtmetingen|
A candidate sampling instrument used for the sampling of the thoracic aerosol fraction in ambient air shall fulfill the requirements detailed in this standard. It describes a test protocol for comparing the results of a candidate sampler with a reference one in a field test. Basically, the reference equivalence awareded to a candidate sampler applies only to the conditions under which the field test was carried out. This implies that the equivalence depends on both the properties of the ambient aerosol present during the test, particularly size distribution, and on concomitant environmental conditions like wind speed, humidity, temperature, and barometric pressure. By carrying out the ambient field test in characteristic situations covering a wide range of relevant ambient parameters it is secured that reference equivalence does hold in prevailing conditions within European countries. Reference equivalence will explicitly not be awared for specific situations (e.g. background only or urban situations only). Above all, the procedure given in this standard is thought to be a practical one, enabling European institutions or industries to assess candidate sampling systems under ambient conditions. The technical competence of these testing laboratories shall be according to the general criteria specified in EN 45001. The reference equivalence awarded using the procedures given in this standard, only applies to the process of sampling aerosol in ambient air. It does not deal with the equivalence of commonly employed automated methods (e.g. attenuation of ß-radiation or the oscillating mass balance method) to analyse the ambient aerosol collected on the collection substrate. The limit of detection and the precision of the analytical method are important considerations for the user, but their determination is outside the scope of this standard. The main arguments for the designated field test procedure are elucidated in Annex A.1. The experimental work done on behalf of the European Union to support this standard is summarized in CEN (1995).
|Nederlandse titel||Luchtkwaliteit - Veldonderzoek om de gelijkwaardigheid aan te tonen van een monsternemingsmethode met de referentie-monsternemingsmethode voor de thoracale fractie van zwevend stof|
|Engelse titel||Air quality - Field test procedure to demonstrate equivalence of sampling methods for the thoracic fraction of suspended particulate matter (SPM) with a reference sampling method for the thoracic fraction of SPM|
|Vervangen door||Normatieve verwijzingen||