|
| 
La Palma
-NO2-
| Observation |
| Category |
: |
Air sampling observation |
| Situation |
: |
ongoing |
| Time zone |
: |
|
| Sampling |
| Sampling height |
: |
|
| Description |
: |
continuous |
| Sampling and analysis frequency |
: |
|
| Sampling environment |
: |
|
| Description for sampling analysis |
: |
Air flow is checked against a precision wet gas meter when each sample collected is analyzed.
Laboratory standards are used for the spectrophotometric analysis.
The sensitivity of the method is 0.1 microgram in the measured solution. |
| Instrument and Analysis |
| Measurement method |
: |
|
| Current status and history of instrument |
: |
Spectrophotometer |
| Description of instrument |
: |
Karl Zeiss, Jena
Spectrophotometer, Karl Zeiss 9 was used since January 1987.
It has been changed to SPECOL 11 in January 1990. |
| Calibration |
| Current scale employed in the measurement |
: |
|
| Measurement calibration |
: |
Standard nitrate solutions |
| Scale and calibration(treasability) |
: |
|
| Data Processing |
| Measurement unit |
: |
ug/m3-25C |
| Data processing |
: |
If the measured value is bellow the minimum detection limited (MDL) the MDL value is assumed.
Only technically false (mainly sampling problems) are rejected. |
| Processing for averaging |
: |
|
| Data flag |
: |
|
| Data remarks |
: |
|
| Other Information |
| Scientific aim |
: |
Monitoring of the long-term trend of NO2 concentrations in the regional background (rural) atmosphere. |
| Reference |
: |
|
|
| submitted by Institute of Meteorology |
|
|
