The chemical analysis service of the Laboratoire d’Aérologie (LAERO) in Toulouse (France) participates twice a year since 1996 to the intercomparison analytical programme of the World Meteorological Organization (WMO) Global Atmospheric Watch (WMO/GAW) programme. This intercomparison exercise is operated by the Quality Assurance/Science Activity Centre (QA/SAC).
All ionic chromatography analyses, and pH and conductivity measurements carried out at the LAERO are evaluated through the WMO-GAW intercomparison studies. Results are available at https://qasac-americas.org/study-results (LAERO is referenced 700106).
Analytical precision of the LAERO is:
- 5% or better for mineral ions,
- 0.6% for pH,
- 2% for conductivity.
The chemical analysis service of the LAERO participates since 2019 to the ACTRIS-ECAC (Aerosol Cloud Trace gases Research Infrastructure -Euorpean center for Aerosol calibration) intercomparison program (EUSAAR 2 method, thermo-optical method, sunset instrument).
Results are available for the LAERO following this link (serial number 461-230).