Photothermal Deflection Spectroscopy of Collected Aerosols

Potential Interpretation Problems The goal is to have more sensitive real-time detectionfor mass concentration but photothermal deflectionmeasures optical absorption. Particulate matter do not follow Beer’s s Law if they arestacked in layers. Data analysis should account for surfacecoverage. Particulate mass will not follow Beer’s s Law if they areoptically thick. Data analysis should account for varyingoptical extinction. As with most other types of photothermal spectrometry,signal may be a function of particulate heat capacity andthermal diffusivity