I would like to reduce the amount of ambient air, especially oxygen in an electrolyte solution. To do that, i put the entire solution in a vaccum champer, and wait for the pressure to settle. But i am unsatisfied with the theory i find on that subject. I have several books referring to henrys law to describe how the dissolved concentration of oxygen changes in low pressure athmosphere, but not how long it takes to reach an equilibrium state. Can anyhelp help me with a good reading suggestion ?
Instead of using a vacuum, have you considered sparging your electrolyte solution with helium gas to displace the ambient air? Helium has a very low solubility in water and is frequently used as a means to displace air from solutions.
Hi,
Take your pure water and then bubble nitrogen into it. another option is heating the water to 60-70C while bubbling nitrogen. this will be faster of course.
you can easily monitor the process by measuring the pH. Since you have to use pure water for an electrolyte solution the pH of the water after the air was removed air should be 7. Then you can add your electrolyte...
Thank you for you help, and i will consider additionally bubbling nitrogen throu my electrolyte. But that still does not answer the question of how long it take for gases to enter/leave fluids. Is there no literature dealing with this problem ?
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