10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
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High Time Resolved Measurements of Ultrafine Particles, PM10, PM2.5, Nitric Oxides and Black Carbon at Berlin City
MARKUS PESCH, Volker Ziegler, Technical Director
Abstract Number: 723 Working Group: Instrumentation
Abstract Although ultrafine particles account only for a little share in the total mass concentration, they are under a cloud of being harmful to health. For this reason an additional monitoring of this particle fractions´ exposure is absolutely necessary. First steps of continuous measurements of ultrafine particles have already been realized in high sophisticated systems like the Grimm EDM665 Wide Range Aerosol Spectrometer. Due to the temporal resolution of the integrated mobility spectrometer (SMPS) as well as it comparatively high costs it does not focus on area-wide monitoring of ultrafine particles.
A more competitive alternative for measuring the particle ambient exposure of ultrafine particles with high temporal resolution (1 second) is the combination of special environmental Condensation Particle Counter (CPC) in combination with a well-established Nafion drying system and an air conditioned mini-shelter. This GRIMM EDM465-UFP is absolutely qualified for continuous measurements of the ultrafine particle exposure and focus on hot- spot observations as well as on area-wide monitoring (e.g. background measurements). The device is performed for long term unattended measurements with low maintenance (1/months). Count efficiency, dryer performances and particle losses in the inlet pipe have been characterized comprehensively.
Measurements taken with the EDM465-UFP next to Berlin Zoo, Germany will be presented. The evaluation of the high time resolved data has been carried out in relation to local and regional sources and under different meteorological aspects. A condensation particle counter and a Laser spectrometer, placed at the measurement terrace of the Department of Environmental Chemistry, Technical University of Berlin, close to Berlin Zoo, is used to observe background concentration of ultrafine particles an PM values. Interesting correlations of UFP with PM10, PM2.5, NOx and black carbon will be shown.