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Laser ablation aerosol particle time-of-flight mass spectrometer (LAAPTOF): performance, reference spectra and classification of atmospheric samples

Shen, Xiaoli; Ramisetty, Ramakrishna; Mohr, Claudia; Huang, Wei; Leisner, Thomas; Saathoff, Harald

The laser ablation aerosol particle time-of-flight mass spectrometer (LAAPTOF, AeroMegt GmbH) is able to identify the chemical composition and mixing state of individual aerosol particles, and thus is a tool for elucidating their impacts on human health, visibility, ecosystem, and climate. The overall detection efficiency (ODE) of the instrument we use was determined to range from  ∼ (0.01±0.01) to  ∼ (4.23±2.36)% for polystyrene latex (PSL) in the size range of 200 to 2000nm,  ∼ (0.44±0.19) to  ∼ (6.57±2.38)% for ammonium nitrate (NH4NO3), and  ∼ (0.14±0.02) to  ∼ (1.46±0.08)% for sodium chloride (NaCl) particles in the size range of 300 to 1000nm. Reference mass spectra of 32 different particle types relevant for atmospheric aerosol (e.g. pure compounds NH4NO3, K2SO4, NaCl, oxalic acid, pinic acid, and pinonic acid; internal mixtures of e.g. salts, secondary organic aerosol, and metallic core–organic shell particles; more complex particles such as soot and dust particles) were determined. Our results show that internally mixed aerosol particles can result in spectra with new clusters of ions, rather than simply a combination of the spectra from the single components. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000082806
Veröffentlicht am 16.05.2018
DOI: 10.5194/amt-11-2325-2018
Zitationen: 10
Web of Science
Zitationen: 9
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Geographie und Geoökologie (IFGG)
Institut für Meteorologie und Klimaforschung - Atmosphärische Aerosolforschung (IMK-AAF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2018
Sprache Englisch
Identifikator ISSN: 1867-8548
KITopen-ID: 1000082806
HGF-Programm 12.03.03 (POF III, LK 01) Gas to particle conversion
Erschienen in Atmospheric measurement techniques
Verlag Copernicus Publications
Band 11
Heft 4
Seiten 2325–2343
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 24.04.2018
Nachgewiesen in Web of Science
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