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Pagonis, Demetrios [Author]; Campuzano-Jost, Pedro [Author]; Piel, Felix [Author]; Tomsche, Laura [Author]; Wisthaler, Armin [Author]; Coggon, Matthew M. [Author]; Gkatzelis, Georgios [Author]; Halliday, Hannah S. [Author]; Krechmer, Jordan E. [Author]; Moore, Richard H. [Author]; Thomson, David S. [Author]; Warneke, Carsten [Author]; Guo, Hongyu [Author]; Wiggins, Elizabeth B. [Author]; Jimenez, Jose L. [Author]; Day, Douglas A. [Author]; Schueneman, Melinda K. [Author]; Brown, Wyatt L. [Author]; Nault, Benjamin A. [Author]; Stark, Harald [Author]; Siemens, Kyla [Author]; Laskin, Alex [Author]

Airborne extractive electrospray mass spectrometry measurements of the chemical composition of organic aerosol

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  • Media type: E-Article
  • Title: Airborne extractive electrospray mass spectrometry measurements of the chemical composition of organic aerosol
  • Contributor: Pagonis, Demetrios [Author]; Campuzano-Jost, Pedro [Author]; Piel, Felix [Author]; Tomsche, Laura [Author]; Wisthaler, Armin [Author]; Coggon, Matthew M. [Author]; Gkatzelis, Georgios [Author]; Halliday, Hannah S. [Author]; Krechmer, Jordan E. [Author]; Moore, Richard H. [Author]; Thomson, David S. [Author]; Warneke, Carsten [Author]; Guo, Hongyu [Author]; Wiggins, Elizabeth B. [Author]; Jimenez, Jose L. [Author]; Day, Douglas A. [Author]; Schueneman, Melinda K. [Author]; Brown, Wyatt L. [Author]; Nault, Benjamin A. [Author]; Stark, Harald [Author]; Siemens, Kyla [Author]; Laskin, Alex [Author]
  • Published: Copernicus, 2021
  • Published in: Atmospheric measurement techniques 14(2), 1545 - 1559 (2021). doi:10.5194/amt-14-1545-2021
  • Language: English
  • DOI: https://doi.org/10.5194/amt-14-1545-2021
  • ISSN: 1867-8548; 1867-1381
  • Origination:
  • Footnote: Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
  • Description: We deployed an extractive electrospray ionization time-of-flight mass spectrometer (EESI-MS) for airborne measurements of biomass burning aerosol during the Fire Influence on Regional to Global Environments and Air Quality (FIREX-AQ) study onboard the NASA DC-8 research aircraft. Through optimization of the electrospray working solution, active control of the electrospray region pressure, and precise control of electrospray capillary position, we achieved 1 Hz quantitative measurements of aerosol nitrocatechol and levoglucosan concentrations up to pressure altitudes of 7 km. The EESI-MS response to levoglucosan and nitrocatechol was calibrated for each flight, with flight-to-flight calibration variability of 60 % (1σ). Laboratory measurements showed no aerosol size dependence in EESI-MS sensitivity below particle geometric diameters of 400 nm, covering 82 % of accumulation-mode aerosol mass during FIREX-AQ. We also present a first in-field intercomparison of EESI-MS with a chemical analysis of aerosol online proton-transfer-reaction mass spectrometer (CHARON PTR-MS) and a high-resolution Aerodyne aerosol mass spectrometer (AMS). EESI-MS and CHARON PTR-MS levoglucosan concentrations were well correlated, with a regression slope of 0.94 (R2=0.77). AMS levoglucosan-equivalent concentrations and EESI-MS levoglucosan showed a greater difference, with a regression slope of 1.36 (R2=0.96), likely indicating the contribution of other compounds to the AMS levoglucosan-equivalent measurement. The total EESI-MS signal showed correlation (R2=0.9) with total organic aerosol measured by AMS, and the EESI-MS bulk organic aerosol sensitivity was 60 % of the sensitivity to levoglucosan standards.
  • Access State: Open Access