Conference Agenda

Overview and details of the sessions of this conference. Please select a date or location to show only sessions at that day or location. Please select a single session for detailed view (with abstracts and downloads if available).

Session Overview
AMT 1: Instrument Calibration
Monday, 30/Aug/2021:
9:00am - 10:00am

Session Chair: Oliver F. Bischof
Session Chair: Paulus Bauer

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9:00am - 9:15am

Pressure-dependent performance of CEN-standard Condensation Particle Counters

Paulus S. Bauer, Dorian Spät, Martina Eisenhut, Andreas Gattringer, Bernadett B. Weinzierl

Faculty of Physics, University of Vienna, Austria

In this study we characterized two different CEN-standard Condensation Particle Counters (CPCs), the TSI 3772-CEN and the Grimm 5410 CEN, at pressures ranging from 250 hPa to 1000 hPa. At standard conditions both instruments conform to the CEN standard. However, with decreasing pressure the counting efficiency curves changed significantly depending on CPC type. This is particularly interesting because both instruments are full flow CPCs (CEN specification).

EAC2021_AMT 1-1_427_Bauer.pdf

9:15am - 9:30am

Traceable calibration of low-cost PM sensors using ambient-like aerosol mixtures

Stefan Horender, Georgi Tancev, Konstantina Vasilatou

Eidgen. Institut für Metrologie, Switzerland

With our new facility PALMA (Horender et al. 2021) we produce ambient like aerosol mixtures with different temperature and humidity in a controlled way. The aerosol consists of elemental carbon, secondary organic matter from ozonolysis of α-pinene, inorganic salts such as ammonium sulphate and ammonium nitrate, mineral dust particles and water. To quantify PM2.5 and PM10 we use PM2.5or PM10 impactors (Norm EN 12341: 2014) through which the aerosol is drawn before depositing the particles on a PTFE coated quartz filter. We used the facility to assess PM measurements of a series of Sensirion SPS30 and a Fidas Frog (PALAS).

EAC2021_AMT 1-2_581_Horender.pdf

9:30am - 9:45am

Calibration of aerosol absorption instruments with nigrosin

Luka Drinovec1,2,3, Uroš Jagodič1,2, Luka Pirker1, Mario Kurtjak4, Kristijan Vidović5, Luca Ferrero6, Bradley Visser7, Jannis Röhrbein7, Ernest Weingartner7, Daniel M. Kalbermatter8, Konstantina Vasilatou8, Griša Močnik1,2,3

1Department of Condensed Matter Physics, Jozef Stefan Institute, Ljubljana, Slovenia; 2Haze Instruments d.o.o., Ljubljana, Slovenia; 3Center for Atmospheric Research, University of Nova Gorica, Nova Gorica, Slovenia; 4Advanced Materials Department, Jozef Stefan Institute, Ljubljana, Slovenia; 5Department of Analytical Chemistry, National Institute of Chemistry, Ljubljana, Slovenia; 6GEMMA center, University of Milano-Bicocca, Milano, Italy; 7Institute for Sensors and Electronics, University of Applied Sciences Northwestern Switzerland, Windisch, Switzerland; 8Federal Institute of Metrology METAS, Bern, Switzerland

There is a need for calibration of aerosol absorption instruments with well defined particles, especially in the infra-red. Imaginary part of the refractive index of solid nigrosin and its aqueous solution was measured. The solvent caused up to a 25% enhancement of absorption in the green and up to a 35% reduction in the infra-red spectral region. The measured refractive index of solid nigrosin was used for Mie calculations, which were verified during the AEROTOX measurement campaign. Calculated absorption coefficient at 532 nm was found to be in very good agreement with those measured using PTAAM-2λ, calibrated with NO2.

EAC2021_AMT 1-3_206_Drinovec.pdf

9:45am - 10:00am

Characterising the Silver Particle Generator: the new silver standard

Martin Irwin, Jacob J Swanson, Vinicius Berger, Umesh Sonkamble, Adam Boies, Hans-Joachim Schulz

Catalytic Instruments GmbH & Co.KG, Germany

We present the characterisation of a new Silver Particle Generator, capable of producing sufficiently high concentrations of particles in the 1–50 nm size range. Data presented includes CPC calibration and repeatability measurements across its operational range. This novel Silver Particle Generator solves several key aspects associated with the production of metallic nanoparticle aerosols. By fixing the location and surface of metal exposed to the supplied gas stream, the stability of the nanoparticles produced is greatly enhanced compared to a typical tube furnace. Further, day-to-day variability is greatly reduced, in both concentration and size domains.

EAC2021_AMT 1-4_595_Irwin.pdf

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