|
| 
Rigi
-NO2-
| Observation |
| Category |
: |
Air sampling observation |
| Situation |
: |
ongoing |
| Time zone |
: |
Local time +1 |
| Sampling |
| Sampling height |
: |
|
| Description |
: |
continuous |
| Sampling and analysis frequency |
: |
1 minute |
| Sampling environment |
: |
|
| Description for sampling analysis |
: |
Air Intake: open-face, ambient |
| Instrument and Analysis |
| Measurement method |
: |
Chemiluminescence |
| Current status and history of instrument |
: |
Chemilumineszenz, Photolysekonverter |
| Description of instrument |
: |
Eco Physics AG
[2001-11-06 thru 2006-01-01] CLD 770;
[2006-01-01 thru 2008-04-28] TEI 42C TL (Thermo Environmental Instruments Inc.);
Since 2008-04-28 Thermo 42i TL (Thermo Scientific) |
| Calibration |
| Current scale employed in the measurement |
: |
NMI PRM BD11 (20ppm ± 0.2ppm) |
| Measurement calibration |
: |
automatic zero and span checks every 25 hrs.; manual zero and span checks every 2 weeks; yearly check of converter efficiency using gas-phase titration |
| Scale and calibration(treasability) |
: |
Since 11/2001: 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 |
: |
Quality assurance procedures involve time series plots, consistency checks. All aggregate calculations based on 10-minute aggregates with greater than 75% availability |
| Processing for averaging |
: |
Processing for Hourly Data:
Estimated standard uncertainty for hourly aggregates:
[2001-11-06 thru 2006-01-01] 0.004 ppbv below 0.04 ppbv, 10 % otherwise;
Processing for Daily Data:
Estimated standard uncertainty for daily aggregates:
[2006-01-01 thru 2009-01-01] uncertainty = 2^0.5*[(0.0816 ppb)^2 + (0.0318 *c)^2]^0.5;
[2009-01-01 thru 2010-01-01] uncertainty = 2^0.5[(0.1291ppb)^2+(0.0320*c)^2]^0.5;
[since 2010-01-01] uncertainty = 2^0.5[(0.1291ppb)^2+(0.0341*c)^2]^0.5
|
| Data flag |
: |
|
| Data remarks |
: |
SD: If the SD is listed: Instead of the SD (standard deviation), the standard uncertainty is given.
|
| Other Information |
| Scientific aim |
: |
|
| Reference |
: |
|
|
| submitted by Swiss Federal Laboratories for Materials Testing and Research |
|
|
