| ![](../../../figure/gaw_stations.gif)
Rigi
-SO2-
Observation |
Category |
: |
Air sampling observation |
Situation |
: |
ongoing |
Time zone |
: |
Local time +1 |
Sampling |
Sampling height |
: |
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Description |
: |
continuous |
Sampling and analysis frequency |
: |
1 minute |
Sampling environment |
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Description for sampling analysis |
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Air Intake: open-face, ambient |
Instrument and Analysis |
Measurement method |
: |
UV Fluorescence |
Current status and history of instrument |
: |
UV Fluorescence |
Description of instrument |
: |
[1987-09-14 thru 1991-03-07] APSA 350E (Thermo Environmental Instruments Inc.);
[1991-03-07 thru 1991-05-30] ML 8850S (Monitor Labs);
[1991-05-30 thru 1993-04-14] ML 8850 (Monitor Labs);
[1993-04-14 thru 2000-06-28] ML 8850S (Monitor Labs);
[2000-06-28 thru 2009-11-17] TEI 43C TL (Thermo Environmental Instruments Inc.);
Since 2009-11-17 Thermo 43i TLE (Thermo Scientific) |
Calibration |
Current scale employed in the measurement |
: |
NMI PRM BH10 (10ppm ± 0.1ppm)
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Measurement calibration |
: |
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Scale and calibration(treasability) |
: |
From 1993 until 07/1995: NIST SRM 1694a (100ppm ± 2ppm);
From 07/1995 until 08/2004: NIST SRM 1693a (50ppm ± 0.5ppm);
Since 08/2004: NMI PRM BH10 (10ppm ± 0.1ppm); NMI is equivalent to NIST (refer to the “Declaration of Equivalence“ between NMI und NIST)
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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 Daily Data: Estimated standard uncertainty for daily aggregates:
[1991-05-01 thru 1999-01-01] 0.6 ppbv below 11.5 ppbv, 5 % otherwise;
[1999-01-01 thru 2008-01-01] 0.2 ppbv below 3.8 ppbv, 4.5 % otherwise;
[2008-01-01 thru 2009-01-01] uncertainty = [(0.0829ppb)^2+(0.0307*c)^2]^0.5;
[2009-01-01 thru 2010-01-01] uncertainty = [(0.1051ppb)^2+(0.0298*c)^2]^0.5;
[since 2010-01-01] uncertainty = [(0.1063ppb)^2+(0.0301*c)^2]^0.5
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Data flag |
: |
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Data remarks |
: |
SD: If the SD is listed: Instead of the SD (standard deviation), the standard uncertainty is given.
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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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