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Brief facts about airfree:

Air-free techniques refer to a range of manipulations in the chemistry laboratory for the handling of compounds that are air-sensitive. These techniques prevent the compounds from reacting with components of air, usually water and oxygen; less commonly carbon dioxide and nitrogen. A common theme among these techniques is the use of a fine or high vacuum to remove air, and the use of an inert gas: preferably argon, but often nitrogen. The two most common types of air-free technique involve the use of a glovebox and a Schlenk line, although some rigorous applications use a high-vacuum line. In both methods, glassware are pre-dried in ovens prior to use. They may be flame-dried to remove adsorbed water. Prior to coming into an inert atmosphere, vessels are further dried by purge-and-refill — the vessel is subjected to a vacuum to remove gases and water, and then refilled with inert gas. This cycle is usually repeated three times or the vacuum is applied for an extended period of time.

Sparging (chemistry) - In chemistry, sparging, also known as gas flushing in metallurgy, is a technique in which a gas is bubbled through a liquid in order to remove other dissolved gas and/or dissolved volatile liquid from that liquid. It is a method of degassing.

Degasification - Degasification is the removal of dissolved gases from liquids, especially water or aqueous solutions. There are numerous possible methods for such removal of gases from liquids.

Schlenk-frit - A Schlenk-frit is a laboratory filtration device operating under inert gas conditions. It separates air- and water-sensitive suspensions into liquid and solid parts. A Schlenk-frit is made of a glass tube with a ground glass joint at both ends, a fused filter and valves at both sides.

Air-free techniques

Laboratory techniques