Ionization efficiency of evolved gas molecules from aerosol particles in a thermal desorption aerosol mass spectrometer: Numerical simulations

2019 ◽  
Vol 53 (7) ◽  
pp. 843-852 ◽  
Author(s):  
Yu Ide ◽  
Kento Uchida ◽  
Nobuyuki Takegawa
Keyword(s):  
Numerical Simulations ◽  
Mass Spectrometer ◽  
Thermal Desorption ◽  
Aerosol Particles ◽  
Ionization Efficiency ◽  
Evolved Gas ◽  
Aerosol Mass Spectrometer ◽  
Aerosol Mass ◽  
Gas Molecules

scholarly journals Highly time-resolved chemical characterization of atmospheric submicron particles during 2008 Beijing Olympic Games using an Aerodyne High-Resolution Aerosol Mass Spectrometer

2010 ◽  
Vol 10 (18) ◽  
pp. 8933-8945 ◽  
Author(s):  
X.-F. Huang ◽  
L.-Y. He ◽  
M. Hu ◽  
M. R. Canagaratna ◽  
Y. Sun ◽  
...  
Keyword(s):  
High Resolution ◽  
Mass Spectrometer ◽  
Olympic Games ◽  
Aerosol Particles ◽  
Organic Aerosol ◽  
Organic Mass ◽  
Aerosol Mass Spectrometer ◽  
Beijing Olympic Games ◽  
Aerosol Mass ◽  
2008 Beijing Olympic Games

Abstract. As part of Campaigns of Air Quality Research in Beijing and Surrounding Region-2008 (CAREBeijing-2008), an Aerodyne High-Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-ToF-AMS) was deployed in urban Beijing to characterize submicron aerosol particles during the time of 2008 Beijing Olympic Games and Paralympic Games (24 July to 20 September 2008). The campaign mean PM1 mass concentration was 63.1 ± 39.8 μg m−3; the mean composition consisted of organics (37.9%), sulfate (26.7%), ammonium (15.9%), nitrate (15.8%), black carbon (3.1%), and chloride (0.87%). The average size distributions of the species (except BC) were all dominated by an accumulation mode peaking at about 600 nm in vacuum aerodynamic diameter, and organics was characterized by an additional smaller mode extending below 100 nm. Positive Matrix Factorization (PMF) analysis of the high resolution organic mass spectral dataset differentiated the organic aerosol into four components, i.e., hydrocarbon-like (HOA), cooking-related (COA), and two oxygenated organic aerosols (OOA-1 and OOA-2), which on average accounted for 18.1, 24.4, 33.7 and 23.7% of the total organic mass, respectively. The HOA was identified to be closely associated with primary combustion sources, while the COA mass spectrum and diurnal pattern showed similar characteristics to that measured for cooking emissions. The OOA components correspond to aged secondary organic aerosol. Although the two OOA components have similar elemental (O/C, H/C) compositions, they display differences in mass spectra and time series which appear to correlate with the different source regions sampled during the campaign. Back trajectory clustering analysis indicated that the southerly air flows were associated with the highest PM1 pollution during the campaign. Aerosol particles in southern airmasses were especially rich in inorganic and oxidized organic species. Aerosol particles in northern airmasses contained a large fraction of primary HOA and COA species, probably due to stronger influences from local emissions. The lowest concentration levels for all major species were obtained during the Olympic game days (8 to 24 August 2008), possibly due to the effects of both strict emission controls and favorable meteorological conditions.

Measurements of Ammonium and Sodium salt Aerosol Particles Using a Laser-ionization Single-particle Aerosol Mass Spectrometer

2007 ◽  
Vol 36 (7) ◽  
pp. 904-905 ◽  
Author(s):  
Masahiro Narukawa ◽  
Yutaka Matsumi ◽  
Kenshi Takahashi ◽  
Akihiro Yabushita
Keyword(s):  
Mass Spectrometer ◽  
Sodium Salt ◽  
Single Particle ◽  
Aerosol Particles ◽  
Laser Ionization ◽  
Aerosol Mass Spectrometer ◽  
Aerosol Mass

scholarly journals Thermal desorption metastable atom bombardment ionization aerosol mass spectrometer

2011 ◽  
Vol 303 (2-3) ◽  
pp. 164-172 ◽  
Author(s):  
Carly B. Robinson ◽  
Joel R. Kimmel ◽  
Donald E. David ◽  
John T. Jayne ◽  
Achim Trimborn ◽  
...  
Keyword(s):  
Mass Spectrometer ◽  
Thermal Desorption ◽  
Metastable Atom ◽  
Aerosol Mass Spectrometer ◽  
Aerosol Mass
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