Absorption and scattering characterization of airborne microparticulates by a cavity ringdown technique

Valery Bulatov, Yuheng Chen, Aktam Khalmanov, Israel Schechter*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Nonresonant cavity ringdown laser absorption spectroscopy (CRLAS) was applied for detection and characterization of airborne particulates. Sensitive detection of a variety of aerosols under ambient conditions was achieved. The method provides, for the first time, time-resolved absolute aerosol concentration, with spatial resolution (along a line). The first report on absorption spectroscopy of monodispersed aerosols (in the size range 100-200 nm) is provided, and comparisons are made with the bulk data. The results indicate the possibility of applying CRLAS for selective analysis of aerosols. A new method for estimating the aerosol refraction index is also obtained from the ringdown data.

Original languageEnglish
Pages (from-to)155-160
Number of pages6
JournalAnalytical and Bioanalytical Chemistry
Volume384
Issue number1
DOIs
StatePublished - Jan 2006
Externally publishedYes

Keywords

  • Aerosols
  • Cavity ringdown
  • Laser Spectroscopy

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