|
| 
Jungfraujoch
-PAN-
| Observation |
| Category |
: |
Air sampling observation |
| Situation |
: |
May 1998 |
| Time zone |
: |
Local time +1 |
| Sampling |
| Sampling height |
: |
|
| Description |
: |
continuous |
| Sampling and analysis frequency |
: |
injection of a 2ml sample every 10min |
| Sampling environment |
: |
measurements in pristine air, usually negligible local sources |
| Description for sampling analysis |
: |
Air intake : open-face, ambient |
| Instrument and Analysis |
| Measurement method |
: |
Gas Chromatography (ECD) |
| Current status and history of instrument |
: |
gas chromatograph with electron capture detector from Meteorologie Consult, Germany |
| Description of instrument |
: |
|
| Calibration |
| Current scale employed in the measurement |
: |
|
| Measurement calibration |
: |
weekly calibration
PAN was generated by the photolysis of excess acetone and NO in
zero air. NO was used as the concentration-determining compound.
This allowed PAN measurements to be directly linked to a NO standard traced back to NIST reference material, in the gas phase. The detection limit was 50 ppt. The overall measurement uncertainty was estimated to be +/- 3% (1s) and included the uncertainty of the calibration standard, the NO and zero air flow during the calibration, and the integration precision of the GC. |
| Scale and calibration(treasability) |
: |
|
| Data Processing |
| Measurement unit |
: |
ppb |
| Data processing |
: |
|
| Processing for averaging |
: |
|
| Data flag |
: |
|
| Data remarks |
: |
|
| Other Information |
| Scientific aim |
: |
|
| Reference |
: |
Zellweger C., M. Ammann, B. Buchmann, P. Hofer, M. Lugauer, R. Rüttimann, N. Streit, E. Weingartner, U. Baltensperger, 2000. Summertime NOy speciation at the Jungfraujoch, 3580 m above sea level, Switzerland. Journal of Geophysical Research, 105, 6655-6667.
Zellweger C., J. Forrer, P. Hofer, S. Nyeki, B. Schwarzenbach, E. Weingartner, M. Ammann, U. Baltensperger, 2003. Partitioning of reactive nitrogen (NOy) and dependence on meteorological conditions in the lower free troposphere. Atmospheric Chemistry and Physics, 3, 779-796.
|
|
| submitted by Swiss Federal Laboratories for Materials Testing and Research |
|
|
