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| 
Jungfraujoch
-NO2-
| Observation |
| Category |
: |
Air sampling observation |
| Situation |
: |
ongoing |
| Time zone |
: |
Local time +1 |
| Sampling |
| Sampling height |
: |
|
| Description |
: |
continuous |
| Sampling and analysis frequency |
: |
Continuous |
| Sampling environment |
: |
measurements in pristine air, usually negligible local sources |
| Description for sampling analysis |
: |
NOx is determinded as NO after photolytic conversion. NO2 is the difference of NOx and NO. 10-minute averages. |
| Instrument and Analysis |
| Measurement method |
: |
Chemiluminescence |
| Current status and history of instrument |
: |
Chemiluminescence, CRANOX |
| Description of instrument |
: |
Eco Physics:
CLD 770/PLC 760 (till 18 December 2000)
CLD 770/PLC 762 (till 22 January 2007)
CLD 89p/PLC 762 (since 22 January 2007)
|
| Calibration |
| Current scale employed in the measurement |
: |
NMI PRM BD11 (20ppm ± 0.2ppm) |
| Measurement calibration |
: |
Every 23 hours an automatic zero-check and an automatic span correction is performed for NOx. |
| Scale and calibration(treasability) |
: |
From 1991 UNTIL 09/2001: NIST SRM 2629a (20ppm ± 0.2ppm);
Since 09/2001: NMI PRM BD11 (20ppm ± 0.2ppm); NMI is equivalent to NIST (refer to the “Declaration of Equivalence“ between NMI und NIST)
|
| Data Processing |
| Measurement unit |
: |
ppbv |
| Data processing |
: |
Data availability required for calculation: >= 75% of 10-minute values |
| Processing for averaging |
: |
Processing for Hourly Data:
Estimated standard uncertainty for hourly averages:
until 31 December 2007: 0.002 ppbv for values below 0.04 ppbv; 5 % for values greater than 0.04 ppbv
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| Data flag |
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| Data remarks |
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| Other Information |
| Scientific aim |
: |
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| Reference |
: |
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| submitted by Swiss Federal Laboratories for Materials Testing and Research |
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