Experts with experience in measurement of atmospheric ultrafine particles (UFP) are invited to participate in a workshop on Ultrafine Particle Number Size Distribution (PNSD) held in Ispra on 19-21 May, hosted by the Joint Research Centre.
Ultrafine particles (UFP), which are present in the air in large numbers, pose a health risk. They generally enter the body through the lungs but then move to essentially all organs. Compared to fine particles (PM2.5), they cause more pulmonary inflammation and are retained longer in the lung. Their toxicity is increased with smaller size, larger surface area, adsorbed surface material, and the physical characteristics of the particles.
This project, related to TOPIC 5 SMP-STAND-2025-ESOS-01-IBA, will aim to revise and validate the existing Technical Specification CEN/TS 17434:2020 ‘Ambient air - Determination of the particle number size distribution of atmospheric aerosol using a Mobility Particle Size Spectrometer (MPSS)’ and develop a new European standard for measurement of particle number size distribution.
For this purpose, two workshops with dedicated experts, including members of the CEN/TC 264/WG 32 ‘Ambient air – Particle number concentration’, will be organized by the VDI/DIN-Commission on Air pollution prevention (KRdL).
In the first workshop, the findings of several data sets used for validation will be discussed to derive the impact of these findings on requests, necessary for a permissible measurement uncertainty calculation concerning the particle number concentration (PNC) derived from PNSD. This includes criteria for the definition of measurement outliers and clear instructions on cases where it is allowed or necessary to exclude them from further evaluation.
Expected outcome: Definition of the maximum permissible measurement uncertainty for the PNC derived from PNSD data and description of a procedure for experimentally checking compliance with the requirement. These deliverables will contribute to a new EN 17434 as key performance characteristics of the method.
Participation is free of charge, but registration is mandatory.