| HE, % de dosage | ≥ 99.9999 | 99.9999 | ||||||||
| H2, ppm | ≤0.1 | <0.1 | ||||||||
| O2, ppm | ≤0.2 | <0.2 | ||||||||
| N2, ppm | ≤0.5 | <0.5 | ||||||||
| CO, ppm | ≤0.1 | <0.1 | ||||||||
| CO2, ppm | ≤0.1 | <0.1 | ||||||||
| CH4, ppm | ≤0.1 | <0.1 | ||||||||
| H2O, ppm | ≤0.5 | <0.5 | ||||||||