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 language | English |
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Pages (from-to) | 155-160 |
Number of pages | 6 |
Journal | Analytical and Bioanalytical Chemistry |
Volume | 384 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2006 |
Externally published | Yes |
Keywords
- Aerosols
- Cavity ringdown
- Laser Spectroscopy