Conference Agenda
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WG3: Measurement techniques for chemical aerosol characterization (II)
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| Presentations | ||||
1:45pm - 2:00pm
TU3-4: 1 Increasing the detection efficiency of nanoparticles and metals using the SP-AMS 1Tampere University, Finland; 2Lund 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 1U.S. Naval Research Laboratory, United States of America; 2Amentum 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 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 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.
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