Standards and calibration facilities for Ammonia (NH3)

Project Description

The objective of this project is to evaluate comparability in standards and calibration facilities for NH3
This project aims to compare all 3 national institutes’ Primary Standard Gas Mixtures to determine international comparability and traceability.

Nmi, the Netherlands, will prepare a set of NH3 in nitrogen mixtures with a nominal concentration in the range from -90 – 110 exp –6 mol/mol to circulate to the other institutes for comparisons with their national standards.

Final Report 2004-12-30

The project is completed and the report can be downloaded here>>.


Metrology in Chemistry (MC)
Rob Wessel, VSL (The Netherlands)
Coordinating Institute
VSL (Netherlands)
Participating Partners
NPL (United Kingdom)
Further Partners
VNIIM (Russia)