To harmonize the measurements of particulate matter, the EMEP manual on PM2.5 and PM1 will to a large extent follow the coming reference from the European Community as it does for PM10. CEN is working on a reference method for PM2.5, but this is not expected to be finalized before earliest in 2004. Even though a reference method is not yet adopted it is highly desired to include the measurements of smaller particles as soon as possible. PM2.5 and PM1 has a larger fraction of long rang transported components than the PM10 which in many cases are influenced by local pollution and/or resuspension. Those countries interested in starting PM2.5 and/or PM1 measurements are encouraged to use one of the candidate CEN reference instrument and the EMEP manual for a general guidance on sampling and analyzing methods. For PM1 it is not yet any CEN group established to decide on a reference method, but one may still use any of the reference or candidate instruments for PM10 or PM2.5 with a PM1 inlet. Some companies manufacturing PM1 inlets are listed below.
Candidate Equivalence Instruments (automated)
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Last updated: November, 2001 by Wenche Aas