Photothermal Deflection Spectroscopy of Collected Aerosols
Photothermal Deflection Spectroscopy of Collected Aerosols Photothermal Deflection Spectroscopy of Collected Aerosols
PM 2.5 – Effects PM 2.5 refers to “Particulate Matter” 2.5 μm m or less in diameter Aerosols are technically liquids though are often grouped as PM 2.5 A PM 2.5 weighs about 1 pg. The health effects associated with exposure to fine particles aresignificant. Scientific studies have shown significant associations between elevated efineparticle levels and premature mortality. Effects associated with fine particle exposure include aggravation ofrespiratory and cardiovascular disease, lung disease, decreased lungfunction, asthma attacks, and certain cardiovascular problems such as heartattacks and cardiac arrhythmia. It is estimated that 44,000 persons die prematurely each year in the USAdue to particulates
PM – Updated RulesUS EPA Fine Particle National Air Quality Standards policy was put pinto effectSeptember, 2006Larger Particulate Matter inhalable coarse particles (PM 10 50 μg/m3 Annual Mean (Annual arithmetic mean not to exceed) 150 μg/m3 24-hour (Not to be exceeded more than once per year)Smaller Particulate Matter fine particles (PM 15.0 μg/m3 Annual Mean35 μg/m3 24-hour (25 ppb w/w)(PM 2.5 )http://www.epa.gov/air/particlepollution/pdfs/20060921_factsheet.pdf.pdf10 )
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- Page 5 and 6: Apparatuses to DetectPhotothermal H
- Page 7 and 8: Photothermal Detection: ComparisonC
- Page 9 and 10: Further Considerations for Chemical
- Page 11: Photothermal Detection of Condensed
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- 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
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- 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
PM – Updated RulesUS EPA Fine Particle National Air Quality Standards policy was put pinto effectSeptember, 2006Larger Particulate Matter inhalable coarse particles (PM 10 50 μg/m3 Annual Mean (Annual arithmetic mean not to exceed) 150 μg/m3 24-hour (Not to be exceeded more than once per year)Smaller Particulate Matter fine particles (PM 15.0 μg/m3 Annual Mean35 μg/m3 24-hour (25 ppb w/w)(PM 2.5 )http://www.epa.gov/air/particlepollution/pdfs/20060921_factsheet.pdf.pdf10 )
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