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| 
Bragança
-SO2-
| Observation |
| Category |
: |
Air sampling observation |
| Situation |
: |
ongoing |
| Time zone |
: |
UTC |
| Sampling |
| Sampling height |
: |
1.5 |
| Description |
: |
continuous |
| Sampling and analysis frequency |
: |
Continuous/24 hours |
| Sampling environment |
: |
Station located far from the shore line, open air, with some hills in the surroundings. |
| Description for sampling analysis |
: |
Sequential sampler NILU FK1:
Absorption solution of hydrogen peroxide for sampling sulphur dioxide in air.
Analytical method:
Ion chromatography.
Flow rate 150 l/h. Bubbler with an absorption solution of hydrogen peroxide (8 identical sampling units). Whatman filter Ø47mm.
Sequential sampler NILU EK starting 2008:
Alkaline impregnated filter method with potassium hydroxide.
Filterpack two stages for sampling gas+particle compounds.
47mm Whatman40 cellulose filters.
|
| Instrument and Analysis |
| Measurement method |
: |
Ion Chromatography |
| Current status and history of instrument |
: |
Sequential sampler NILU FK1 from 1979 to 1999.
Starting 2007:
Filterpack EK Air Sampler.
NILU, Norway.
Ref. Nº 03200101 |
| Description of instrument |
: |
Flow rate: 15 L/h |
| Calibration |
| Current scale employed in the measurement |
: |
|
| Measurement calibration |
: |
|
| Scale and calibration(treasability) |
: |
Observer's Standard |
| Data Processing |
| Measurement unit |
: |
ugS/m3-25C |
| Data processing |
: |
Data quality control is based on annual laboratory intercalibration. |
| Processing for averaging |
: |
Processing for Monthly Data:
Monthly data are arithmetric means of daily data. |
| 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 Instituto de Meteorologia |
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