We'll have vials in which we expect H2 generation to occur. Over the first few days, the amount of generated H2 is expected to be at ppb level.
GC (+ TCD) detector is best when your H2 level is in the ppm range.
GC-MS is difficult as the ionization energy of H2 is high and the M/Z ratio will be small (2).
FID is not reliable as hydrogen flame is used
Other fancy methods (e.g., Raman-based and optical methods) are quite expensive.
What are your suggestions?
Thanks
1.Spectrométrie de masse
2.Cellules électrochimiques
3. La Tunable Diode Laser ( TDLAS)
Depends on what else is present in your sample. As you seem to have a GC available, you could used a pulsed discharge detector.
https://www.vici.com/instr/pdd.php
Gas chromatography, ultrasonic meters, electrochemical sensors, Raman lidar, and gas-stripping methods are some of the most reliable techniques for measuring hydrogen gas concentrations at ppb levels, depending on the specific application and environmental conditions.
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