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Technical aspects
Air quality analysis equipment on 31 December 2004
Pollutants |
Make and type of collectors |
Number |
Measurement method |
Nitrogen Oxides
NOX |
Environnement S.A. - AC31M
Thermo E.C. - 42C
|
15
9 |
Chemi-luminescence |
Sulphur Dioxide
SO2 |
Seres - SF2000 |
9 |
UV Fluorescence |
Ozone
O3 |
Environnement S.A. - 0341M
Seres - OZ2000
|
22
2 |
UV Photometry |
Black smoked
BS |
Environnement S.A. - Filtromat |
9 |
Opacimetry |
Particulate matter
PM10 & PM2.5 |
TEOM 1400A
|
14 |
Balance |
Carbon Oxide
CO |
Environnement S.A. - CO11M
Seres - CO2000 |
2
5 |
IR absorption |
Benzene, Toluene, Xylene
BTX |
Syntech - GC855
Syntech - GC955
Environnement S.A. - VOC71M
|
1
1
1 |
Chromatography |
| NO2, O3, SO2 |
Opsis - ER 150 |
1 |
DOAS |
The air quality analysers managed by Atmo Auvergne operate 24/24 and 365 days a year, with an average availability rate of about 95%. The timestep covered by one basic measurement is fifteen minutes, except for black smoke collectors.
Black smoke estimates are made by first collecting regular samples and then measuring them on a daily timestep, using a reflectometer.
Atmo Auvergne makes sure that all its air quality analysers are systematically calibrated on site with transfer standards such as low concentration bottles, mobile permeation benches and mobile ozone generators, among others.
Laboratory
Atmo Auvergne has an air-conditioned metrology laboratory where it stores its own reference standards. These are regularly recalibrated using standards provided by the Laboratoire Central de Surveillance de la Quality de l'Air (Central Laboratory for the Monitoring of Air Quality) based on a nationally validated protocol and valid for all French measurement networks.
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