ABSTRACT
The most widely used application of Raman scattering in aerosol research is the determination of the chemical composition of aerosol particles. Raman spectroscopy is a technique sensitive to particle composition. The scattered radiation perpendicular to the oscillation plane of the incident wave is usually much larger than for any other scattering geometry in the case of vibrational Raman scattering. The interpretation of Raman spectrum of spherical or spheroidal particles is complicated by these morphology dependent resonances peaks. Careful provisions have to be made to avoid interpreting resonances as "true" Raman lines. To improve the suppression of the elastically scattered light, a holographic Raman filter is often used in front of the entrance slit of the monochromator. The determination of the chemical composition of gaseous media by Raman scattering is a highly successful technique in combustion research. Raman scattering was applied in the past almost exclusively in single phase situations.
