40 The Use of Photoacoustic Spectroscopy to Characterize and Monitor Soot in Combustion Processes
Downloaded by UNIV LAVAL on July 12, 2016 | http://pubs.acs.org Publication Date: September 23, 1980 | doi: 10.1021/bk-1980-0134.ch040
D. K. KILLINGER, J. MOORE, and S. M. JAPAR Engineering and Research Staff, Ford Motor Company, Dearborn, MI 48121
Optical measurements of airborne combustion aerosols have been carried out for a number of years, usually with light scat tering techniques. However, due to the particle size dependence of light scattering and the variable particle size distributions of smokes, it is extremely difficult to relate light scattering properties to particulate mass concentrations. The measurement of light absorption by particles can be directly related to particle mass i f two conditions are met: . Optical absorption per particle mass is independent of particle size; this holds for particle diameter (assuming spherical particles) D
