Isi ihe dị n'ime ikuku bụ nitrogen na oxygen, na-eji okpomọkụ ambient, nitrogen na oxygen na ikuku na zeolite molecular sieve (ZMS) adsorption arụmọrụ dị iche (oxygen nwere ike ịgafe na nitrogen adsorption), chepụta usoro kwesịrị ekwesị, ma mee nitrogen. na nkewa oxygen iji nweta oxygen.