April 15, 2021 Maria Ochsenkuehn-Petropoulou of project partner NTUA along with other partners in the project have collaborated on the following paper Method for Preparation of a Candidate Reference Material of PM10 and PM2.5 Airborne Particulate Filters Loaded with Incineration Ash-Inter Comparison Results for Metal Concentrations. The paper appears in Atmosphere. You can view the paper here, and also over on our Documents & Publications page.