| Gas component | Symbol | xi (mol/mol) | u(xi) (mol/mol) | u(xi), % |
| Argon | Ar | 9.583 × 10−5 | 0.032 × 10−3 | 33.18 |
| Methane | CH4 | 91.321 × 10−2 | 0.469 × 10−4 | 0.01 |
| Carbon monoxide | CO | 1.396 × 10−8 | 0.053 × 10−7 | 38.32 |
| Carbon dioxide | CO2 | 1.015 × 10−2 | 0.014 × 10−4 | 0.01 |
| Ethane | C2H6 | 9.840 × 10−3 | 0.033 × 10−3 | 0.33 |
| Propane | C3H8 | 3.897 × 10−3 | 0.097 × 10−4 | 0.25 |
| n-butane | C4H10 | 2.013 × 10−3 | 0.037 × 10−4 | 0.18 |
| i-butane | C4H10 | 2.017 × 10−3 | 0.037 × 10−4 | 0.18 |
| n-pentane | C5H12 | 9.935 × 10−4 | 0.028 × 10−4 | 0.28 |
| i-pentane | C5H12 | 9.915 × 10−4 | 0.027 × 10−4 | 0.27 |
| Total hydrocarbon | CxHy | 8.223 × 10−6 | 0.024 × 10−4 | 28.79 |
| Helium | He | 4.824 × 10−3 | 0.074 × 10−5 | 0.02 |
| Hydrogen | H2 | 2.054 × 10−2 | 0.030 × 10−4 | 0.01 |
| Water | H2O | 3.448 × 10−6 | 0.098 × 10−5 | 28.35 |
| Nitrogen | N2 | 3.048 × 10−2 | 0.051 × 10−4 | 0.02 |
| Oxygen | O2 | 1.022 × 10−6 | 0.029 × 10−5 | 27.90 |
| Sulfur dioxide | SO2 | 2.025 × 10−9 | 0.083 × 10−8 | 40.83 |
| n-hexane | C6H14 | 9.441 × 10−4 | 0.024 × 10−4 | 0.26 |