Photothermal Deflection Spectroscopy of Collected Aerosols
Photothermal Deflection Spectroscopy of Collected Aerosols Photothermal Deflection Spectroscopy of Collected Aerosols
Aerosol Air PollutionAgriculture WasteLogan, UtahVehicle EmissionsIndustrial EmissionsLand-Use Change
Photothermal Detection of Condensed Aerosols* Why aerosols?– Increasing awareness of health risks due to PM 2.5 or less– Increasing amounts with anthropogenic origin– Implications in public health and safety– Environmental regulations What aerosols?– Natural Smoke, Salts (NaCl(NaCl), Clay Minerals (dust, clay)– AnthropogenicAmmonium Nitrate, Pesticide Sprays, Exhaust Smoke, Smog Why photothermal?– Sensitivity– Complex matrix– Difficult analysis– In Situ analysis more accurate* Initial collaboration with James Amonette, Tom Autrey and Nancy y Foster-Mills, Pacific Northwest Laboratory
- Page 3 and 4: Chemical Analysis Perspective ofPho
- Page 5 and 6: Apparatuses to DetectPhotothermal H
- Page 7 and 8: Photothermal Detection: ComparisonC
- Page 9: Further Considerations for Chemical
- Page 13 and 14: PM - Updated RulesUS EPA Fine Parti
- Page 15 and 16: Laboratory-Based Condensed PhaseAer
- Page 17 and 18: Aerosol / Particle Generation Nebul
- Page 19 and 20: Aerosols Generation and SamplingAto
- Page 21 and 22: Size and Number Calibration Aerosol
- Page 23 and 24: IR Laser-Excited Photothermal Defle
- Page 25 and 26: Aerosols Number Concentration100908
- Page 27 and 28: So why are the detection limits so
- Page 29 and 30: MOUDI Calibration CurveStage 6 (0.5
- Page 31 and 32: Finite Element Analysis Modeling Fi
- Page 33 and 34: Particle “Crowding” Effect Does
- Page 35 and 36: Results for Substrate Thermal Condu
- Page 37 and 38: Inference from Heat Transport and S
- Page 39 and 40: Future Aerosol Work We need to us a
- Page 41: Acknowledgements Several persons wo
Aerosol Air PollutionAgriculture WasteLogan, UtahVehicle EmissionsIndustrial EmissionsLand-Use Change