Papers 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 by Alexandre Bescond, Caroline Oster, Paola Fisicaro, Sharon Goddard, Paul Quincey, Lamprini-Areti Tsakanika, Theopisti Lymperopoulou and Maria Ochsenkuehn-Petropoulou Statistics of a Sharp GP2Y Low-Cost Aerosol PM Sensor Output Signals Klemen Bučar, Jeanne Malet, Luca Stabile, Jure Pražnikar, Stefan Seeger and Matjaž Žitnik Directed Self-Assembly of Polystyrene Nanospheres by Direct Laser-Writing Lithography Eleonora Cara, Federico Ferrarese Lupi, Matteo Fretto, Natascia De Leo, Mauro Tortello, Renato Gonnelli, Katia Sparnacci and Luca Boarino AEROMET Project: From Metrology to Air Quality and Climate Change Francisco J. Gómez-Moreno Direct approach to determine the size setting error and size resolution of an optical particle counter Mathias Geisler and Kai Dirscherl Experimental evaluation of the in-the-field capabilities of total-reflection X-ray fluorescence analysis to trace fine and ultrafine aerosol particles in populated areas János Osán, Endre Börcsök, Ottó Czömpöly, Csenge Dian, Veronika Groma, Luca Stabile and Szabina Török Real-time pollen monitoring using digital holography Sauvageat, E., Zeder, Y., Auderset, K., Calpini, B., Clot, B., Crouzy, B., Konzelmann, T., Lieberherr, G., Tummon, F., and Vasilatou, K Calibration of optical particle counters: First comprehensive inter-comparison for particle sizes up to 5 μm and number concentrations up to 2 cm−3 Konstantina Vasilatou, Kai Discherl, Kenjiro Iida, Hiromu Sakurai, Stefan Horender and Kevin Auderset Facility for calibration of optical and condensation particle counters based on a turbulent aerosol mixing tube and a reference optical particle counter Stefan Horender, Kevin Auderset and Konstantina Vasilatou Mobility particle size spectrometers: Calibration procedures and measurement uncertainties A. Wiedensohler, A. Wiesner, K. Weinhold, W. Birmili, M. Hermann, M. Merkel, T. Müller, S. Pfeifer, A. Schmidt, T. Tuch, F. Velarde, P. Quincey, S. Seeger & A. Nowak Posters Characterization of artificial and aerosol nanoparticles with reference-free grazing incidence X-ray fluorescence analysis Philipp Hönicke, Yves Kayser, Rainer Unterumsberger, Beatrix Pollakowski-Herrmann, Christian Seim & Burkhard Beckhoff Aerosol metrology for atmospheric science and air quality: the AEROMET project Paul Quincey, Konstantina Vasilatou, Alfred Wiedensohler, Stefan Seeger, Luca Boarino, Petr Klapetek, Kai Dirscherl, Francisco Moreno, Peter Pedersen, Thomas Pedersen, Matjaz Zitnik, Jeanne Malet, Jenny Rissler, Francois Gaie-Levrel, Szabina Torok, Markus Fiebig, Maria Ochsenkühn-Petropoulou, Luca Stabile, Michele Laus, Armin Gross & Burkhard Beckhoff. Aerosol Metrology for Atmospheric Science and Air Quality Guanghong Zeng and Kai Dirscherl Presentations Evaluation of atomic force microscopy measurements of small regular and nonregular particles using Gwyddion software J. Šperka, M. Havlíček, M. Valtr, D. Nečas, P. Klapetek Aerosol measurements and modelling at Czech Metrology Institute, Introduction of AEROMET project J. Šperka, M. Havlíček, R. Šlesinger, V. Hortvík, Mi. Valtr, J. Martinek, P. Klapetek Reports Results of the inter-laboratory comparison exercise for TC and EC measurements P. Quincey, NPL