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Pan-European research project for clean air
Date:6/8/2011

in recent years. These are, however, not such a great hazard, but rather the respirable, very small soot particles are. They are, in part, smaller than 0.1 micrometer (m) or 100 nanometers (nm); that is, one thousandth of the diameter of a human hair. Due to, among other things, new diesel injection techniques, the amount of the fine (2.5 m) and ultrafine (smaller than 0.1 m) soot particles has increased, and metrology is thus confronted with large problems. For periodic exhaust gas inspections, meters of opaqueness, so-called opacimeters, are still used; these show their weaknesses precisely with the very minute particles. Thus, in future, the entire measurement technology should be upgraded, perhaps with soot sensors or also with particle counters which do not measure the quantity but rather the number of particles and they do this, above all, more precisely.

The aim of the pan-European project is to compare the individual approaches, to further develop measuring instruments and to attend to correct traceability of measuring results. To this end, internationally harmonized standards are to be developed on the basis of the number of particles (instead of their mass, as hitherto), which then will facilitate the approval and calibration of measuring instruments. "Precisely regarding the subject of air pollution prevention, cross-border cooperation lends itself well. After all, air does not stop at national borders", Martin Thedens, PTB's project coordinator, points out. The project laid out for three years is a so-called Joint Research Project (JRP) within the scope of the European Metrology Research Progamme EMRP. Besides the experts of PTB and the Bundesanstalt fr Materialforschung und -prfung (BAM) (Federal Institute for Materials Research and Testing), colleagues from Denmark, Switzerland, Slovenia, France, Finland, Great Britain, the Netherlands and the Joint Research Centre JRC of the EU Commission are participating. The significance of the subjec
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Contact: Dr. Martin Thedens
martin.thedens@ptb.de
49-053-159-23510
Physikalisch-Technische Bundesanstalt (PTB)
Source:Eurekalert  

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