1. Risto Hillamo, FMI (risto.hillamo@fmi.fi)
PM1 composition measurements with the Aerodyne Aerosol Chemical Speciation Monitor (ACSM)
Risto Hillamo, Minna Aurela, Samara Carbone, Hilkka Timonen and Sanna Saarikoski
Aerosol Research, Air Quality, Finnish Meteorological Institute, Helsinki, Finland
TFMM May,2011
Risto Hillamo, FMI

2. Risto Hillamo, FMI (risto.hillamo@fmi.fi)
ACSM
- 70 kg, 300 W
TFMM May,2011
Risto Hillamo, FMI

3. Risto Hillamo, FMI (risto.hillamo@fmi.fi)
Design comparison
ACSM
High-Resolution AMS
Source: John Jayne, Aerodyne
Source John Jayne, Aerodyne
Robust monitoring instrument
No chopper (aerosol=total - filter)
Typical time resolution min
Unit mass (UM) resolution
Simple data evaluation
High-performance research instrument
Chopper (aerosol=open - closed)
High-time resolving (1 Hz)
High mass resolution (UM, V, W)
Data evaluation sophisticated
Switching between measurement modes
Additional modules (LS, SP)
TFMM May,2011
Risto Hillamo, FMI

4. Unit mass/high resolution
Similar to ACSM
quadrupole ms
HR-ToF-AMS
TFMM May,2011
Risto Hillamo, FMI

5. Risto Hillamo, FMI (risto.hillamo@fmi.fi)
Measurement sites
Urban background
site
Urban site
Residential site
Helsinki downtown
Houses/hectare
- Detached houses in Helsinki area (primary/secondary heating with wood)
TFMM May,2011
Risto Hillamo, FMI

6. Helsinki urban site 1 December 2010 – 7 January 2011
For the ACSM 50% collection efficiency , CE=0.5
15 µg m-3
TFMM May,2011
Risto Hillamo, FMI

7. Risto Hillamo, FMI (risto.hillamo@fmi.fi)
Helsinki urban site
Fire of the department store
CE=0.5
TFMM May,2011
Risto Hillamo, FMI

8. Risto Hillamo, FMI (risto.hillamo@fmi.fi)
Helsinki uban site
TFMM May,2011
Risto Hillamo, FMI

9. Helsinki residential site 17 February-16 March 2011
Analysed average:
10.5 µg m-3
TFMM May,2011
Risto Hillamo, FMI

10. Helsinki residential site
CE=0.5
TFMM May,2011
Risto Hillamo, FMI

11. Risto Hillamo, FMI (risto.hillamo@fmi.fi)
Residential site
TFMM May,2011
Risto Hillamo, FMI

12. Risto Hillamo, FMI (risto.hillamo@fmi.fi)
Residential site an example of the organic mass spectra (23 February 9 pm, OM: 28 µg m-3)
TFMM May,2011
Risto Hillamo, FMI

13. Helsinki urban background site 21 March 2011- 1 May 2011
Analysed average:
5.3 µg m-3
TFMM May,2011
Risto Hillamo, FMI

14. Risto Hillamo, FMI (risto.hillamo@fmi.fi)
Urban background
CE=0.5
TFMM May,2011
Risto Hillamo, FMI

15. Risto Hillamo, FMI (risto.hillamo@fmi.fi)
Urban background
TFMM May,2011
Risto Hillamo, FMI

16. Risto Hillamo, FMI (risto.hillamo@fmi.fi)
Comparison residential ACSM/urban background HR-AMS and Sunset OC/EC analyzer
POM=1.6xOC
TFMM May,2011
Risto Hillamo, FMI

17. Comparison urban background ACSM/HR-AMS
TFMM May,2011
Risto Hillamo, FMI