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ISO 17034 (2016)
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; cis-2-Butene; 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); trans-2-Butene; Xenon;
Comparison method; Gravimetric method;
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