Under CopyrightOelschlägel, KathrinKathrinOelschlägelBenke, AnnegretAnnegretBenkeGöhler, DanielDanielGöhlerPotthoff, AnnegretAnnegretPotthoffRudolph, AndreasAndreasRudolph2022-03-146.10.20202020https://publica.fraunhofer.de/handle/publica/40890110.24406/publica-fhg-408901The performed experiments highlight that the environmental pollution with plastic waste is both, a number-and mass-based problem. A Particle Counter for liquids is used to compare non-weathered and laboratory-weathered polyethylene terephthalate (PET) samples. The particle size distribution (PSD) in a size range from 2-200µm and the absolute number concentration for each sample are detectable. Applications include support for ecotoxicological testing of microplastics.enmicroplasticparticle concentrationsizefractionation620666poster