Wavelength and size dependence in single particle laser aerosol mass spectra

Elisabeth E. Wade, George R. Farquar, Paul T. Steele, Erica L. McJimpsey, Carlito B Lebrilla, David P. Fergenson

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The impact of particle size and desorption/ionization laser wavelength on ion signal in single particle laser mass spectrometry was investigated. Individual particles of α-cyano hydroxy-cinnamic acid, dihydroxy benzoic acid, and nitroguanadine were sized, tracked, and desorbed/ionized by 266 or 355 nm laser light, and the resulting mass spectra were analyzed. Sodium ion signal and total ion signal were determined. Sodium ion is a measure of desorption efficiency, while total ion signal is sensitive to both desorption and ionization. The sodium ion signal was found to be independent of wavelength, above a minimum laser energy which varied by compound. The total ion signal was found to be higher for 266 nm desorption/ionization laser mass spectra in most cases. The sodium ion and total ion signals were found to be linear with particle size, regardless of laser energy or wavelength. Both sodium ion and total ion signals were also found to vary roughly linearly with laser energy, showing a much weaker dependance on laser energy than predicted by MALDI results. These results suggest that the absorbance spectrum of the compound does not predict desorption and ionization efficiency, above some minimum laser energy.

Original languageEnglish (US)
Pages (from-to)657-666
Number of pages10
JournalJournal of Aerosol Science
Volume39
Issue number8
DOIs
StatePublished - Aug 2008

Fingerprint

Aerosols
Particles (particulate matter)
laser
Ions
aerosol
wavelength
Wavelength
ion
Lasers
Desorption
desorption
Sodium
sodium
Ionization
ionization
energy
particle
Particle size
particle size
Benzoic Acid

Keywords

  • Desorption/ionization
  • Single particle aerosol mass spectrometry
  • Wavelength dependence

ASJC Scopus subject areas

  • Atmospheric Science
  • Environmental Science(all)

Cite this

Wade, E. E., Farquar, G. R., Steele, P. T., McJimpsey, E. L., Lebrilla, C. B., & Fergenson, D. P. (2008). Wavelength and size dependence in single particle laser aerosol mass spectra. Journal of Aerosol Science, 39(8), 657-666. https://doi.org/10.1016/j.jaerosci.2008.03.007

Wavelength and size dependence in single particle laser aerosol mass spectra. / Wade, Elisabeth E.; Farquar, George R.; Steele, Paul T.; McJimpsey, Erica L.; Lebrilla, Carlito B; Fergenson, David P.

In: Journal of Aerosol Science, Vol. 39, No. 8, 08.2008, p. 657-666.

Research output: Contribution to journalArticle

Wade, EE, Farquar, GR, Steele, PT, McJimpsey, EL, Lebrilla, CB & Fergenson, DP 2008, 'Wavelength and size dependence in single particle laser aerosol mass spectra', Journal of Aerosol Science, vol. 39, no. 8, pp. 657-666. https://doi.org/10.1016/j.jaerosci.2008.03.007
Wade EE, Farquar GR, Steele PT, McJimpsey EL, Lebrilla CB, Fergenson DP. Wavelength and size dependence in single particle laser aerosol mass spectra. Journal of Aerosol Science. 2008 Aug;39(8):657-666. https://doi.org/10.1016/j.jaerosci.2008.03.007
Wade, Elisabeth E. ; Farquar, George R. ; Steele, Paul T. ; McJimpsey, Erica L. ; Lebrilla, Carlito B ; Fergenson, David P. / Wavelength and size dependence in single particle laser aerosol mass spectra. In: Journal of Aerosol Science. 2008 ; Vol. 39, No. 8. pp. 657-666.
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