On-line chemical analysis of aerosols by rapid single-particle mass spectrometry

Peter G. Carson, Kenneth R. Neubauer, Murray V. Johnston, Anthony S. Wexler

Research output: Contribution to journalArticle

96 Citations (Scopus)

Abstract

The design and performance of an instrument for rapid single-particle mass spectrometry (RSMS) is described. Aerosols are sampled directly into a mass spectrometer where individual particles are detected by light scattering from a continuous laser beam. The scattered radiation from each particle triggers an excimer laser which ablates the particle in-flight. Ions produced from the particle are analyzed by time-of-flight mass spectrometry. The chemical composition of the particle is inferred from the distribution of ions in the mass spectrum. Since the chemical composition is determined approximately 1 ms after a particle enters the sampling inlet, chemical transformation by reaction, condensation, evaporation, or phase change is minimized. Since the ion formation process in RSMS is similar to that in laser microprobe mass spectrometry, RSMS exhibits similar attributes for single-particle analysis. These include detection of trace organic and inorganic species, speciation of inorganic materials, and the ability to distinguish the surface versus total volume composition of a particle. RSMS extends these capabilities to include semivolatile compounds and surface chemical reactions. Potential applications of RSMS to atmospheric aerosols are discussed including speciation of semivolatile and nonvolatile sulfur compounds, source apportionment through isotopic ratio measurements, and the detection of thin coatings on particles produced by condensation of reactive gases.

Original languageEnglish (US)
Pages (from-to)535-545
Number of pages11
JournalJournal of Aerosol Science
Volume26
Issue number4
DOIs
StatePublished - 1995
Externally publishedYes

Fingerprint

Aerosols
chemical analysis
Particles (particulate matter)
Mass spectrometry
mass spectrometry
aerosol
Chemical analysis
Ions
Atmospheric aerosols
Sulfur Compounds
Condensation reactions
Sulfur compounds
laser
Excimer lasers
Mass spectrometers
particle
Light scattering
Laser beams
ion
condensation

ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution
  • Materials Science(all)
  • Atmospheric Science
  • Environmental Science(all)

Cite this

On-line chemical analysis of aerosols by rapid single-particle mass spectrometry. / Carson, Peter G.; Neubauer, Kenneth R.; Johnston, Murray V.; Wexler, Anthony S.

In: Journal of Aerosol Science, Vol. 26, No. 4, 1995, p. 535-545.

Research output: Contribution to journalArticle

Carson, Peter G. ; Neubauer, Kenneth R. ; Johnston, Murray V. ; Wexler, Anthony S. / On-line chemical analysis of aerosols by rapid single-particle mass spectrometry. In: Journal of Aerosol Science. 1995 ; Vol. 26, No. 4. pp. 535-545.
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