Quote Originally Posted by GRHazelton View Post
Since nitrogen is hardly an inert gas, can you suggest alternatives more readily available without going to a gas welding shop? Butane, propane, dust off or canned air gas?
Go to the party shop and get helium instead.

Nitrogen is an inert gas under almost any circumstances---butane and propane are not, but are suitable for storing chemicals. Nitrogen is lighter than oxygen, so it will not blanket your solution for any length of time, though you shouldn't put much faith in any gas doing so. We use nitrogen and argon for all of our air-free chemistry at work.