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
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)