I'm working on photocatalytic water splitting and I'm trying to measure the H2 by GC. I know the best carrier gas is Ar and TCD is most common for this purpose. Could anyone tell me about the best choice of column to separate the H2 and O2? What is the best temperature to do that?
The problem is not to separate H2 and O2, but to separate O2 and N2. The latter is always present as a contaminant from air. The best would be a molecular sieves capillary column with Ar and TCD. The T< 100C is advised. Just try. Don't forget to bake your column from time to time at ~ 180C overnight to remove adsorbed water.
Yurii V Geletii : Professor, thank you very much for your answer. I will definitely try it.
MS-5A column is definitely suitable for high-resolution separation of permanent gases but Porapak Q column usually use in food industry analyzes. So I prefer MS-5A column for separation of H2 and O2 from water splitting reaction and I would suggest GC-MS measurement instead of GC for this purpose.
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