National Measurement Institute - NMI Sydney Chemical and Biological Services


Reference Gas Mixtures

Accreditation No.


Site No.


Date of Accreditation

11 Jan 2008


Bradfield Road
Lindfield West, NSW 2070


Dr D Smeulders P: +61 (02) 84673534


Services available to external clients

Scope of Accreditation

Reference Gas Mixtures

ISO 17034 (2016)


Service Product Determinant Technique Procedure Limitations
Certified reference gases Reference gases and reference gas mixes 2,2-Dimethylpropane (neopentane); 2-Methylbutane (isopentane); Argon; Butane (n-butane); Carbon dioxide (CO2); Carbon monoxide; Dinitrogen monoxide (nitrous oxide); Ethane; Ethene (ethylene); Ethyne (acetylene); Helium; Heptane (n-heptane); Hexane (n-hexane); Hydrogen; Hydrogen sulfide; Isobutane; Methane; Nitrogen; Nonane (n-nonane); Octane (n-octane); Oxygen; Oxygen in liquefied natural gas (LNG); Pentane (n-pentane); Propane; Propene (propylene); Xenon; cis-2-Butene; trans-2-Butene Comparison method; Gravimetric ISO 6142-1
ISO 6143


With property value capability of -
0.03% relative uncertainty of measurement for primary reference gases except methane
0.1% relative uncertainty of measurement for certified reference gases except methane
0.003% relative uncertainty of measurement for primary reference gases for methane
0.005% relative uncertainty of measurement for certified reference gases for methane
For the following components:

2,2-Dimethylpropane (neopentane)0.1 μmol/mol to 30 cmol/mol
cis-2-Butene; trans-2-Butene0.1 cmol/mol to 80 cmol/mol
Argon1 μmol/mol to 1 mol/mol
Butane (n-Butane)0.1 μmol/mol to 80 cmol/mol
Carbon dioxide0.05 μmol/mol to 1 mol/mol
Carbon monoxide0.05 μmol/mol to 1 mol/mol
Dinitrogen monoxide (Nitrous oxide)10 μmol to 0.1 cmol/mol
Ethane0.05 μmol/mol to 1 mol/mol
Ethene (Ethylene)1 μmol/mol to 80 cmol/mol
Ethyne (Acetylene)1 μmol/mol to 5 cmol/mol
Helium0.1 cmol/mol to 10 cmol/mol
Heptane0.1 μmol/mol to 0.1 cmol/mol
Hexane (n-Hexane)0.1 μmol/mol to 1 cmol/mol
Hydrogen1 μmol/mol to 1 mol/mol
Hydrogen sulfide1 μmol/mol to 200 μmol/mol
Isobutane0.1 μmol/mol to 80 cmol/mol
Isopentane0.1 μmol/mol to 80 cmol/mol
Methane0.05 μmol/mol to 1 mol/mol
Nitrogen0.1 μmol/mol to 1 mol/mol
Nonane (n-Nonane)0.1 μmol/mol to 0.1 cmol/mol
Octane (n-Octane)0.1 μmol/mol to 0.1 cmol/mol
Oxygen0.1 μmol/mol to 1 mol/mol
Oxygen in LNG50 μmol/mol to 100 μmol/mol
Pentane (n-Pentane)0.1 μmol/mol to 80 cmol/mol
Propane1 μmol/mol to 1 mol/mol
Propene (Proylene)1 μmol/mol to 1 mol/mol
Xenon0.01 cmol/mol to 1 cmol/mol

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