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  6. Hydrogen gas quality evaluation

Hydrogen gas quality evaluation

Based on our techniques of sampling and analysis of trace chemical in the semiconductor industry, we can offer high sensitivity analysis that can detect very low concentrations of impurities.
Theses impurities contains not only in ISO 14687 Grade-D, but also other components that can poison the fuel-cell.

Test Items

Quality evaluation of station supply hydrogen and manufacturing process gas.

  Substances Maximum allowable concentration Standard method for analysis
1 Water 5 ppm Dew point meter
2 total hydrocarbons 2 ppm GC-FID
3 Methane 100 ppm GC-FID
4 Oxygen(O2) 5 ppm Trace oxygen sensor
5 Helium(He) 300 ppm GC-TCD
6 Nitrogen(N2) 300 ppm GC-TCD、GC-HID
7 Argon(Ar) 300 ppm GC-TCD、GC-HID
8 Carbon dioxide(CO2) 2 ppm GC-FID(methanation reactor) 、GC-HID
9 Carbon monoxide(CO) 0.2 ppm GC-FID(methanation reactor) 、GC-HID
10 Sulfer compounds(asH2S) 0.004 ppm GC-FPD
11 Formaldehyde(HCHO) 0.2 ppm DNPH/LC、CNET/LC
12 Formic acid(HCOOH) 0.2 ppm Imp-IC 、BremS-A/IC
13 Ammonia(NH3) 0.1 ppm Imp-IC 、BremS-B/IC
14 Halogen compounds 0.05 ppm Imp-IC 、BremS-A/IC
15 Particles 1 mg/kg Filter collection, balance
・CNET is our product for aldehyde sampling.
・BremS is our exclusive technology of solid active sampler for acid-base sampling.

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