| PSM 3 | |||
| Component | Symbol | Mole fraction | Uncertainty |
| Argon | Ar | 4.171 × 10−4 | 0.018 × 10−2 |
| Methane | CH4 | 91.654 × 10−2 | 0.267 × 10−3 |
| Ethane | C2H6 | 5.946 × 10−2 | 0.021 × 10−2 |
| Propane | C3H8 | 2.355 × 10−2 | 0.061 × 10−3 |
| Total hydrocarbon | CxHy | 9.166 × 10−6 | 0.053 × 10−4 |
| Hydrogen | H2 | 2.291 × 10−6 | 0.013 × 10−4 |
| Water | H2O | 3.666 × 10−6 | 0.021 × 10−4 |
| Nitrogen | N2 | 1.146 × 10−5 | 0.066 × 10−4 |
| Oxygen | O2 | 2.291 × 10−6 | 0.013 × 10−4 |