How is oxygen content measured?
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Please help. Why is the oxygen level acceptable when measuring hydrogen using the chromatography method in the workplace, but it exceeds the limit when measuring nitrogen? In reality, both values should be within acceptable limits.
I’m just talking from a theoretical perspective; the specific details still need to take into account everyone’s opinions. I checked against the spectrum; although under hydrogen-loading conditions, the oxygen and argon peaks merge, when measuring nitrogen, the peak corresponding to hydrogen is close to the oxygen peak. If the larger nitrogen peak is also close to the oxygen peak (in cases where the separation is not good), could this lead to deviations in peak splitting? This results in a higher oxygen peak value. Was the previous spectrum good? Use a digital photo, then take a screenshot and upload it. Also: it is advisable to have a micro-oxygen analyzer powered by a fuel cell. It’s easier for comparison. Remember: Zirconia cannot be used, as the hydrogen background interferes with it!
Mainly, N2 and AR are not distinguishable; AR cannot be included in the H2 process. However, since N2 comes from air separation, AR may be present.
Please tell us what type of detector you are using, as well as the type of carrier gas, so that we can help you analyze it