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