What is wrong with this picture? snipped from http://www.isotope.com/userfiles/files/ ... kaging.pdf
Hint: no gas handling experience required.
[edit] Re. purging containers with inert gas, Silviu warned:
By coincidence I just spotted, online, something I knew from left-behinds after somebody's party in a public park. Some party-size tanks of balloon gas contain up to 20% air. The attached ad image says or implies mixture in about five places. from http://www.partycity.com/product/large+ ... Set=110369....or helium from party stores - used for balloons. But I think that party-grade helium is really impure, and I don't know what it's contaminated with.