SP-AMS Inter-comparison Campaign
Transcript of SP-AMS Inter-comparison Campaign
SIC SP-AMS Inter-comparison
Campaign
06.03. – 22.03.2013
FMI – LU – ETH PSI – FHNW
Points of Interest
2
1)Reproducibility of MS
2)Refractory COx
3)Fragmentation
Five Soot Types
3 Introduction Reproducibility ref CO2 Fragmentation Set-Up
Regal Black
Introduction Reproducibility Fragmentation ref. CO2 Set-Up 4
Set up
DMA 1
Introduction Reproducibility Fragmentation ref. CO2 Set-Up 5
Soot Source
Coagu- lation
VKL
CPC 1
SP-AMS 1 SP-AMS 3
SP2
CO2/RH
SP-AMS 2 CPMA DMA 3
CPC 3
Room 1
IN
Room 3 DMA 2
CPC 4
CPC 2
CCN
ATOFMS
APM
Room 2
MAAP
Soot Types & Experiments
6
1. CAST “Black”
• Propane soot (C/O = 0.25) ~10% thermal OC1
2. CAST “Brown”
• Propane soot (C/O = 0.41) ~30% thermal OC1
3. PALAS spark-generated
• GFG soot; marketed as “diesel-like”
4. “Regal Black”
• Carbon black (calibration)2
5. Fullerene-enriched soot
• C60 and C70 (~5 and 1%) enriched graphitic soot.3
6. Hematite 1Sc
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Introduction Reproducibility Fragmentation ref. CO2 Set-Up
1. Size Selection
• 200 nm – 350 nm – 500 nm
2. Thermodenuding
•250 °C
3. Furnace
• 1400 °C
4. Argon
•COx
5. Laser Power Drop
• Influence on Ms
• Internal Calibration
6. More…
Sketch Room 1
7
Reality
8
Room 1 Line Set-Up
9
to CPMA DMA 3 CPC 3 SP2
from Sources
to RH T CO2
from ambient