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Inter-Comparison of Instruments Measuring Black Carbon Content of Soot Particles

Instrumentation for Black Carbon Measurement Boston College, May 2005. . . . . . Photoacoustic Spectometer (PAS). Multi-Angle Absorption Photometer (MAAP). Single Particle Soot Photometer (SP2). Aerosol Mass Spectrometer (AMS). Absorption. Physical

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Inter-Comparison of Instruments Measuring Black Carbon Content of Soot Particles

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    1. Inter-Comparison of Instruments Measuring Black Carbon Content of Soot Particles

    3. Participants in Inter-Comparison Experiment

    4. Summary of Experiment Size-selected mobility diameter (DMA) Commercial glassy carbon spheresSize-selected mobility diameter (DMA) Commercial glassy carbon spheres

    5. Apparatus for Soot Production and Processing

    6. Black Carbon Measurement Techniques - Optical Color incandescence rings www.dropletmeasurement.comColor incandescence rings www.dropletmeasurement.com

    7. The Aerosol Mass Spectrometer

    8. The Aerosol Mass Spectrometer

    9. The Aerosol Mass Spectrometer

    10. AMS Particle Analysis - Physical

    11. AMS Particle Analysis - Physical

    12. AMS-Based Characterization of Soot Particles

    13. AMS-Based Characterization of Soot Particles

    14. AMS-Based Characterization of Soot Particles

    15. All Instruments vs. AMS: Black Carbon Spheres

    16. Response of the SP2 and PAS was independent of flame conditions (i.e. organic content) particle shape and size.

    17. Nascent Soot: MAAP vs. AMS

    19. Summary of Instrument Comparison

    20. Summary of Instrument Comparison For BC spheres, all 4 instruments agree within ~10%. For nascent fractal particles, the MAAP response is ~50% more BC than the other instruments. For coated fractal particles, the MAAP response is ~60% higher than the AMS and the PAS is ~20% higher.

    23. EXTRA SLIDES

    24. Photoacoustic Spectrometer (PAS)

    25. Multi-Angle Absorption Photometer (MAAP)

    26. Single Particle Soot Photometer (SP2)

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