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WG3: Measurement techniques for chemical aerosol characterization (II)
Time:
Tuesday, 02/Sept/2025:
1:45pm - 2:45pm
Session Chair: Patrick Weber Session Chair: Cristina Colombi
Location: Room Raffaello
Presentations
1:45pm - 2:00pm TU3-4: 1
Increasing the detection efficiency of nanoparticles and metals using the SP-AMS
Ukko-Ville Mäkinen 1 , Axel Eriksson1 , Panu Karjalainen2
1 Tampere University, Finland; 2 Lund University, Sweden
This study presents an inlet system for extending the detection range of the SP-AMS with the added benefit of improved metal detection. The inlet uses Cab-O-Jet 300 particles produced by an atomizer and an agglomeration chamber for agglomerating sampled particles on the Cab-O-Jet 300 particles that can be transmitted into the SP-AMS. Due to higher vaporization temperatures associated with the SP-AMS laser, metals agglomerated on the particles can be measured and their relative ionization efficiencies can be calibrated.
2:00pm - 2:15pm TU3-4: 2
Material property characterization using optical and mass spectrometry of individually trapped particles
Matthew Hart1 , Landon Hernandez 2 , Vasanthi Sivaprakasam1
1 U.S. Naval Research Laboratory, United States of America; 2 Amentum Services Inc., United States of America
We present a new method to measure the total scattering and extinction cross sections, and optical and mass spectrometry from a single micron sized particle in a touchless environment.
2:15pm - 2:30pm TU3-4: 3
Development and application of a drone-based sampling platform for chemical characterization of height resolved aerosol particles using chemical ionization mass spectrometry
Leo Håkansson , Epameinondas Tsiligiannis, Mattias Hallquist, Cheng Wu
University of Gothenburg, Sweden
We present a drone-based aerosol sampling platform with fast, high resolution meteorological sensors and a pump-driven filter sampler. The system features streamlined data and power management, including real-time telemetry and remote pump control, ensuring operational integrity and efficiency. A field campaign in Gothenburg, Sweden demonstrated the systems capability in performing targeted aerosol sampling in relation to the development of the nocturnal boundary layer. Aerosl particles were analyzed semi-online using chemical ionization mass spectrometry (CIMS) with a filter inlet for gases and aerosols (FIGAERO). Mass spectrometry analysis revealed compositional differences in ground and aloft samples.
2:30pm - 2:45pm TU3-4: 4
Rapid and Sensitive Chemical Analysis of Individual Picolitre Aerosol Droplets by Mass Spectrometry
Bryan Richard Bzdek , Edward Neal, Joshua Harrison, Jim Strong Walker
University of Bristol, United Kingdom
Aerosol droplets are unique microcompartments containing microscopic amounts of material and exhibiting remarkable chemical reactivity. In this presentation, we describe a novel approach for mass spectrometric analysis of individual aqueous picolitre droplets (∼1–180 pL, or ~5-100 µm radius) containing down to ∼1 pg analyte mass per droplet. Individual droplets are generated using a microdroplet dispenser, imparted a small amount of net charge, and guided to the inlet of a high-resolution mass spectrometer using a linear quadrupole-electrodynamic balance. We will characterise the sensitivity of the approach and will discuss experiments investigating accelerated chemical reactions in aerosol droplets.
