Gas Standards

We supply methane concentration and stable isotope ratio standard gases. The table lists the currently available mixtures.

  [CH4] δ13C-CH4 δD-CH4
  [ppmv] [CPDB] ± 0.2 ‰ [SMOW] ± 4 ‰
L-iso1 2,500 -66.5 TBD
B-iso1 2,500 -54.5 TBD
T-iso1 2,500 -38.3 -138
T-iso2 25,000 -38.3 -138
T-iso3 250 -38.3 -138
H-iso1 2,500 -23.9 -144

The bottles contain 28 litres of gas at 34 bar and have an internal valve with a C-10 5/8" - 18 UNF fitting. Dimensions: ø 73mm x H 311.1mm, wt: 0.4kg. The balance (dilution) gas is hydrocarbon free air. Other trace gases may be present. For different gases, isotopes, concentrations, mixtures, and regulators please contact us.