| Zugriffsnummer | 43368 |
| Dokumenttyp | Repository E-Print |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Particle Measurement Programme (PMP) : inter-laboratory correlation exercise with condensation particle counters (CPCs) |
| Autor(in); Institution |
Terres, Alexander; BMW Group, München, GERMANY
Nowak, Andreas; 3.4, Analytische Chemie der Gasphase, PTB-Braunschweig
Rosahl, Johannes; 3.4, Analytische Chemie der Gasphase, PTB-Braunschweig
Hildebrandt, Margit; 3.4, Analytische Chemie der Gasphase, PTB-Braunschweig
Southgate, Jason; AEA Ricardo, Oxfordshire, UK
Marshall, I.; AEA Ricardo, Oxfordshire, UK
Mamakos, Athanasios; AVL, Graz, AUSTRIA
Cresnoverh, Martin; AVL, Graz, AUSTRIA
Usarek, Sebastian; Volkswagen, Wolfsburg, GERMANY
Kaatz, Manuel; Volkswagen, Wolfsburg, GERMANY
Horn, Hans-Georg; TSI, Aachen, GERMANY
Bacher, Heinz; BMW Group, München, GERMANY
Giechaskiel, Barouch; JRC, Ispra, ITALY
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| Quelle/Jahr | (2019), 90 S. |
| Schriftenreihe | EUR: 29277 EN |
| Availability | [online only] |
| ISSN | 1831-9424 |
| ISBN | 978-92-79-88006-3 |
| DOI | |
| Persistent Identifier | |
| Berichtsnummer | EUR 29277 EN |
| Verlag | Luxembourg: Publications Office of the European Union |
| Freie Schlagworte | anti-pollution device ; atmospheric pollution ; environmental research ; metrology ; motor vehicle pollution ; pollution control ; reduction of gas emissions ; research report ; scientific report |
| Zusammenfassung | A limit on particle number (PN) has been part of the European vehicle emission legislation since EURO 5b from 2011. However, the legislation does not define or recommend a single calibration aerosol for PN. Since the counting efficiencies of CPCs complying with UNECE R49/R83 regulations are known to exhibit strong material dependence on the type of calibration aerosol, standardisation of the calibration aerosol would be advantageous. The selection of an appropriate calibration aerosol needs to consider the associated repeatability and the reproducibility in the measurements. Today, electrospray generators for emery oil are the prevalent solution for CPC suppliers owing to a tight control of the particle properties (particles are spherical with insignificant multiple charge). On the other hand, soot/graphite particle generators are easier to handle and are more commonly employed in calibration laboratories. In addition, the recent introduction of on-road PN portable emissions measurement systems (PEMS) in the European regulation clearly requires calibration of the equipment against soot/graphite particles. Therefore, the possibility to standardise soot for all applications would be appealing. The need to shift the lower cut-off diameter towards 10 nm in the automotive field is also under assessment both by the PMP group and the European Commission through several Horizon 2020 research projects. A selection of a suitable calibration aerosol needs to also consider such developments. Soot-like aerosol is a candidate for a standardised calibration aerosol for applications in automotive exhaust. This round robin exercise was carried out to examine the inter-laboratory variability of calibrations with soot-like aerosol and to establish a qualitative comparison with other techniques. During this exercise, three CPCs (a TSI 23 nm engine exhaust CPC, a TSI 10 nm and a prototype AVL 23 nm) and one miniCAST soot generator were circulated among 7 laboratories in Europe. The circulated instruments were compared with in-house reference counters and in-house particle generators. These include generators for spark-discharge soot, diffusion flame soot, silver particles and emery oil. |
| Kostenfreier Zugang | Freier Zugang |
| Themenbereich der Metrologie | Metrologie in der Chemie und Stoffeigenschaften |
Zitierung
Terres, A., Ebert, V., Nowak, A., Rosahl, J., Hildebrandt, M., Southgate, J., Marshall, I., Mamakos, A., Cresnoverh, M., Usarek, S., Kaatz, M., Horn, H.-G., Bacher, H., & Giechaskiel, B. (2019). Particle Measurement Programme (PMP) : inter-laboratory correlation exercise with condensation particle counters (CPCs). https://doi.org/10.2760/859241