Schlenk-frit
![A schlenk-frit.](http://upload.wikimedia.org/wikipedia/commons/thumb/7/77/Schlenk_frit.svg/40px-Schlenk_frit.svg.png)
A Schlenk-frit is a laboratory filtration device operating under inert gas conditions (schlenk 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 (a porous glass disk) and valves at both sides.[1]
Use
Before usage, the Schlenk-frit has to be heated, to remove water traces. The Schlenk-frit is put onto the product flask using an inert gas counterflow and closed at the top end with a second flask. The whole is turned 180° to start filtration. The liquid parts of the reaction mix go through the filter while the solid parts remain.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/1/1e/Schlenk_frit_use.svg/440px-Schlenk_frit_use.svg.png)
To speed up the filtration pressure can be lowered at the bottom part of the filter. Care has to be taken that the solvent does not evaporate.
References
- ^ Ackermann, Jürgen; Reinhold Tacke1, Ulrich Wannagat, Ulrich Koke, Friedrich Meyer (1979). "Derivate des 1-(4-Chlorphenyl)silacyclohexans mit 3-(Diethylamino)propyl- und 2-(Diethylamino)ethyl-Gruppierungen". Liebigs Annalen der Chemie. 1979 (11): 1915–1924. doi:10.1002/jlac.197919791128.
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Zhang, Jie; Alan M. Bond, Douglas R. MacFarlane, Stewart A. Forsyth, and Jennifer M. Pringle (2005). "Voltammetric Studies on the Reduction of Polyoxometalate Anions in Ionic Liquids". Inorganic Chemistry. 44 (14): 5123–5132. doi:10.1021/ic050032t. hdl:10536/DRO/DU:30063348. PMID 15998041.{{cite journal}}
: CS1 maint: multiple names: authors list (link)
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