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Browsing by Subject "droplet impaction"

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  • Rekola, Iiris (2022)
    This thesis examines the Particle-into-liquid sampler (PILS), a collection device for water-soluble aerosol components. The literature review is divided into four sections. A components section describes working mechanism of the PILS and components used in a typical PILS setup. A performance section discusses the collection efficiency, time response and resolution, background, and various other metrics of the PILS. A section on analysis methods reports on the various analytical methods uses in combination with PILS, while a research application looks at the various ways the PILS has been used in aerosol research. The experimental part focuses on untargeted analysis of water-soluble aerosol content of indoor and outdoor, using PILS for sample collection and off-line gas chromatography-mass spectrometry (GC- MS) and two-dimensional gas chromatography-time-of-flight mass spectrometry (GCxGC-TOFMS) for analysis. To increase the collection efficiency, various sampling parameters were optimized, but with no major success. Tentative identification of detected compounds revealed mostly small organic compounds: oxygen compounds, benzenoids, organic acids, hydrocarbons, lipids and lipid-like molecules and organoheterocyclic compounds.