DoE NIST - VSL

The U.S. National Institute of Standards and Technology (NIST) and VSL have signed a memorandum of understanding for regular intercomparisons of Primary Standard Gas Mixtures. As a result a Declaration of Equivalence (DoE) was signed for O2 in N2, CO2 in N2 and air, CO in N2 and air, C3H8 in N2 and air, NO in N2, NO2 in N2 and air, SO2 in N2, ethanol in N2, H2S in N2, VOC’s and natural gas. Other components are under study and likely to be added to the Declaration of Equivalence. This DoE is annualy renewed and the latest version can be found here.