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Real-Time Detection of Smoke and Exhaust: Optical Methods with Aethalometer™

Smoke and exhaust particles contribute to regional haze and air quality issues. Traditional chemical analyses for toxic components are cumbersome and costly. The Aethalometer™ offers a solution by utilizing optical absorption methods to measure black carbon and UV-absorbing materials in real time. This portable instrument can analyze various smoke sources, including diesel exhaust, wood smoke, and tobacco smoke. With quick, on-the-spot data, the Aethalometer™ serves as an effective alternative to standard chemical analyses for understanding air quality impacts on public health.

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Real-Time Detection of Smoke and Exhaust: Optical Methods with Aethalometer™

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Presentation Transcript

  1. Introduction to RMW Instruments Tom Henry RMW Company, Denver CO Tony Hansen Magee Scientific Company, Berkeley CA

  2. Smoke and Exhaust: Aesthetic Impacts • Smoke & exhaust particles absorb and reflect sunlight, contributing to haze • Regional haze and visibility management important issues in West

  3. Smoke and Exhaust: Listed Air Toxics • Toxic components • Specific compounds require specific chemical analyses • Analyses cumbersome & expensive • Accompanying components may permit more rapid detection by optical means • Black soot • UV-absorbing material

  4. Analytical Basis • Optically-absorbing material an indicator for diesel exhaust, wood- and tobacco smoke • “Black” carbon (‘BC’, ‘EC’) • “UV-absorbing material” (‘UVPM’) • Optical analysis is fast, sensitive, can be performed on-the-spot

  5. Analytical Method– Optical Absorption

  6. Optical vs. Chemical Analyses: Ambient Air “Six Cities Study”: Harvard School of Public Health

  7. Optical vs. Chemical Analyses: Tobacco Smoke Report published by Lawrence Berkeley National Laboratory

  8. Analytical Instrument: Aethalometer™ • While continuously collecting sample, measures optical absorption in real time at 2 wavelengths (880 nm & 370 nm UV) • Converts optical absorption to mass concentration of BC and UVPM • Real-time data: 1 second / 1 minute / 1 hour

  9. Analytical Instrument : Aethalometer™ 19-inch rack mount

  10. Analytical Instrument : Aethalometer™ Battery-powered ‘Portable’

  11. Fireplace Smoke

  12. Cigarette Smoke

  13. Agricultural-Burning Smoke

  14. Bus Yard Diesel Exhaust– Community Impact

  15. Diesel Indoors: Truck Enters Hall

  16. On the Bus in Boston

  17. In a Car in Boston

  18. Summary • Black carbon & UV-absorbing carbon indicate diesel exhaust, wood smoke,tobacco smoke • Aethalometer™ uses optical method to measure BC and UVPM in real time • Aethalometer on-the-spot data equivalent to standard chemical analyses

  19. Acknowledgments • Harvard School of Public Health • Lawrence Berkeley National Laboratory • For further information www.mageesci.com • Representative Tom Henry, RMW Company, (303) 388-0109

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