Bilateral comparison of standards of CO (in N2), NO (in N2), NO2 (in air) and SO2 (in air) at ambient levels.
Project Description
A bilateral comparison will be organised between LNE and NPL.
| Species | Standard prepared by | Target date for distribution |
| 250 nmol/mol SO2/air | Certification of commercial standard (NPL) | Jan 2008 |
| 200 nmol/mol NO2/air | Certification of commercial standard (LNE) | April 2009 |
| 10 µmol/mol CO/N2 | Gravimetric standard (NPL) | April 2009 |
| 200 nmol/mol NO/N2 | Certification of commercial standard (LNE) | April 2009 |
Final Report 2013-07-05.
The project has been completed and the report can be downloaded here>>