| Item name |
Index |
| The volume fraction of hydrogen (H2)/10 -2 ≥ |
99.5 |
| The volume fraction of oxygen (O2)/10 -2 ≤ |
0.2 |
| The volume fraction of nitrogen plus argon (N2+Ar)/10 -2 ≤ |
0.3 |
| Free water/(ml/40L bottle) |
No free water |
| CO/(ppm) |
CO+CO2<5 |
| CO2/(ppm) |
| CH4/(ppm) |
Hydrocarbon <1000 |
| C2H6/(ppm) |
