A comparison of particle mass spectrometers during the 1999 Atlanta supersite project

Ann M. Middlebrook, Daniel M. Murphy, Shan Hu Lee, David S. Thomson, Kimberly A. Prather, Ryan J. Wenzel, Don Yuan Liu, Denis J. Phares, Kevin P. Rhoads, Anthony S. Wexler, Murray V. Johnston, José L. Jimenez, John T. Jayne, Douglas R. Worsnop, Ivan Yourshaw, John H. Seinfeld, Richard C. Flagan

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

During the Atlanta Supersite Project, four particle mass spectrometers were operated together for the first time: NOAA's Particle Analysis by Laser Mass Spectrometer (PALMS), University of California at Riverside's Aerosol Time-of-Flight Mass Spectrometer (ATOFMS), University of Delaware's Rapid Single-Particle Mass Spectrometer II (RSMS-II), and Aerodyne's Aerosol Mass Spectrometer (AMS). Although these mass spectrometers are generally classified as similar instruments, they clearly have different characteristics due to their unique designs. One primary difference is related to the volatilization/ionization method: PALMS, ATOFMS, and RSMS-II utilize laser desorption/ionization, whereas particles in the AMS instrument are volatilized by impaction onto a heated surface with the resulting components ionized by electron impact. Thus mass spectral data from the AMS are representative of the ensemble of particles sampled, and those from the laser-based instruments are representative of individual particles. In addition, the AMS instrument cannot analyze refractory material such as soot, sodium chloride, and crustal elements, and some sulfate or water-rich particles may not always be analyzed with every laser-based instrument. A main difference among the laser-based mass spectrometers is that the RSMS-II instrument can obtain size-resolved single particle composition information for particles with aerodynamic diameters as small as 15 nm. The minimum sizes analyzed by ATOFMS and PALMS are 0.2 and about 0.35 μm, respectively, in aerodynamic diameter. Furthermore, PALMS, ATOFMS, and RSMS-II use different laser ionization conditions. Despite these differences the laser-based instruments found similar individual particle classifications, and their relative fractions among comparable sized particles from Atlanta were broadly consistent. Finally, the AMS measurements of the nitrate/sulfate mole ratio were highly correlated with composite measurements (r2 = 0.93). In contrast, the PALMS nitrate/sulfate ion ratios were only moderately correlated (r2 ∼ 0.7).

Original languageEnglish (US)
JournalJournal of Geophysical Research D: Atmospheres
Volume108
Issue number7
StatePublished - Apr 16 2003

Fingerprint

Particle spectrometers
Atlanta (GA)
particle mass
Mass spectrometers
spectrometers
mass spectrometers
spectrometer
aerosols
Aerosols
laser
Lasers
laser spectrometers
aerosol
lasers
project
comparison
particle
ionization
Sulfates
Ionization

Keywords

  • Aerosol
  • Mass spectrometer
  • Single particle composition

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)
  • Atmospheric Science
  • Geochemistry and Petrology
  • Geophysics
  • Oceanography
  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Middlebrook, A. M., Murphy, D. M., Lee, S. H., Thomson, D. S., Prather, K. A., Wenzel, R. J., ... Flagan, R. C. (2003). A comparison of particle mass spectrometers during the 1999 Atlanta supersite project. Journal of Geophysical Research D: Atmospheres, 108(7).

A comparison of particle mass spectrometers during the 1999 Atlanta supersite project. / Middlebrook, Ann M.; Murphy, Daniel M.; Lee, Shan Hu; Thomson, David S.; Prather, Kimberly A.; Wenzel, Ryan J.; Liu, Don Yuan; Phares, Denis J.; Rhoads, Kevin P.; Wexler, Anthony S.; Johnston, Murray V.; Jimenez, José L.; Jayne, John T.; Worsnop, Douglas R.; Yourshaw, Ivan; Seinfeld, John H.; Flagan, Richard C.

In: Journal of Geophysical Research D: Atmospheres, Vol. 108, No. 7, 16.04.2003.

Research output: Contribution to journalArticle

Middlebrook, AM, Murphy, DM, Lee, SH, Thomson, DS, Prather, KA, Wenzel, RJ, Liu, DY, Phares, DJ, Rhoads, KP, Wexler, AS, Johnston, MV, Jimenez, JL, Jayne, JT, Worsnop, DR, Yourshaw, I, Seinfeld, JH & Flagan, RC 2003, 'A comparison of particle mass spectrometers during the 1999 Atlanta supersite project', Journal of Geophysical Research D: Atmospheres, vol. 108, no. 7.
Middlebrook AM, Murphy DM, Lee SH, Thomson DS, Prather KA, Wenzel RJ et al. A comparison of particle mass spectrometers during the 1999 Atlanta supersite project. Journal of Geophysical Research D: Atmospheres. 2003 Apr 16;108(7).
Middlebrook, Ann M. ; Murphy, Daniel M. ; Lee, Shan Hu ; Thomson, David S. ; Prather, Kimberly A. ; Wenzel, Ryan J. ; Liu, Don Yuan ; Phares, Denis J. ; Rhoads, Kevin P. ; Wexler, Anthony S. ; Johnston, Murray V. ; Jimenez, José L. ; Jayne, John T. ; Worsnop, Douglas R. ; Yourshaw, Ivan ; Seinfeld, John H. ; Flagan, Richard C. / A comparison of particle mass spectrometers during the 1999 Atlanta supersite project. In: Journal of Geophysical Research D: Atmospheres. 2003 ; Vol. 108, No. 7.
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