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Advancing the global comparability of chemical and biological measurement standards and capabilities - Enabling measurements to be made with confidence
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Published GAWG Pilot Studies
Final Report
Nitrous Oxide (N2O) in air
10 µmol mol–1 water vapour in nitrogen
Particle number and concentration comparisons
Ambient CO2, 380 to 480 μmol/mol
Monoterpenes in Nitrogen
Ambient carbon monoxide
Spectroscopic methods for HNO3 value assignment
Halocarbons in air
Nitrogen dioxide 10 µmol/mol by spectroscopic methods
Multicomponent preparative capability study
Nitogen monoxide in nitrogen
SF6, CFCs - emission levels
Natural gas types IV and V
Greenhouse gases CO2, CH4 - ambient levels
Ozone - ambient levels
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