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Glovebox

45 bytes added, 20:28, 22 May 2019
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[[File:Argon Glovebox.jpg|200px|thumb|right]]
A glovebox is an enclosure for working under a controlled environment. They are capable of maintaining environments of >0.1 ppm oxygen and water. Oxygen is removed by passing the atmosphere over a hot copper catalyst, and water is removed via molecular sieves. Once the copper/molecular sieves have become fully saturated, they are regenerated by heating the molecular sieves, and passing a reducing mixture of argon and hydrogen over the copper.
Samples are moved into a glovebox via an antechamber. To remove all adsorbed water or oxygen from the sample, it is first loaded into the antechamber, which is subsequently evacuated to a low vacuum state. After some time has passed, the antechamber is refilled with an inert gas, and the process is repeated 3 times. This procedure may be insufficient for highly porous media such as Kim-wipes. In this case, the sample should be placed in a vacuum oven overnight before transfer into a glovebox.
[[File:Glovebox.jpg|200px|thumb|right|Glovebox Diagnostic Read]]