Dear Youn Charles-Blin I don't know the exact answer, but you might want to check out the following closely related threads on RG to get some ideas:

https://www.researchgate.net/post/Can_simple_purging_of_inert_gas_in_glove_box_give_moisture_free_atmosphere_less_than_1ppm

https://www.researchgate.net/post/Our_glove_box_suffers_from_high_oxygen_level_but_low_moisture_level_How_to_solve_it

Frank T. Edelmann thank you for your answer, I will follow these threads as well.

Best.

Dear all, I think it is a matter of intermolecular forces. H2O being highly polar molecule characterized by strong H-bonding due to the small H-atom, so it sticks tightly to Al surfaces inside the GB, which requires long time to get rid of it. On the other side, O2 being a gas means very weak (or almost nul) intermolecular forces, so its adhesion to internal surfaces of the GB and its content (bottles, other stuff, ...) is negligeable, thus easy and fast elimination. A small remark: ambiant O2 has the bi-radical structure (°O-O°) and not (O=O), these are the singlet and doublet chemical structures of O2. My Regards

Abdelkader BOUAZIZ thank you very much for you explanation!

Best regards

Dear Youn Charles-Blin I think that Abdelkader BOUAZIZ provided a rather perfect explanation for your finding. That's it!

Hi;

Please see the links bellow:

https://www.researchgate.net/post/Can_simple_purging_of_inert_gas_in_glove_box_give_moisture_free_atmosphere_less_than_1ppm.

https://www.researchgate.net/post/Our_glove_box_suffers_from_high_oxygen_level_but_low_moisture_level_How_to_solve_it.

With my best regards

Kindly check https://www.sciencedirect.com/topics/chemistry/glovebox-technique

Also check https://www.intechopen.com/books/applied-modern-control/the-design-and-development-of-control-system-for-high-vacuum-deoxygenated-and-water-removal-glove-bo

Dear All, here are two more useful links in which this question is addressed:

http://nsmn1.uh.edu/miljanic/Glovebox.pdf

https://lctechinc.com/glovebox-faq/