Difference between revisions of "Büchner flask"

From Sciencemadness Wiki
Jump to: navigation, search
 
Line 7: Line 7:
 
==Availability==
 
==Availability==
 
Büchner flask can be bought from lab suppliers.
 
Büchner flask can be bought from lab suppliers.
 +
 +
==DIY Büchner flask==
 +
Although it's more expensive, if you don't have a Büchner flask, you can always use a [[round-bottom flask]] with a gas inlet [[adapter]] or a [[Schlenk flask]] as a makeshift vacuum flask, but this is only if you really don't have one or you broke yours.
  
 
==References==
 
==References==

Latest revision as of 19:18, 29 January 2019

A Büchner flask (incorrectly, but often spelled Buchner funnel), also known under many other names like vacuum flask, filter flask, suction flask, side-arm flask or Kitasato flask, is a thick-walled Erlenmeyer flask used in combination with a Büchner funnel and a vacuum source in vacuum filtration.

General

A Büchner flask consists of a with a thick-walled Erlenmeyer flask which has a short glass tube and hose barb protruding about 1-2 cm from its neck. Some Büchner flasks lack the lateral vacuum adapter, and instead have a hole, where a plastic vacuum adapter is added. While this might sound complex, such flasks have a few advantages: are easier to clean and there's less risk of breaking the lateral tube, which would make a typical side-arm flask unusable. Some Büchner flasks have ground glass joint.

Availability

Büchner flask can be bought from lab suppliers.

DIY Büchner flask

Although it's more expensive, if you don't have a Büchner flask, you can always use a round-bottom flask with a gas inlet adapter or a Schlenk flask as a makeshift vacuum flask, but this is only if you really don't have one or you broke yours.

References

Relevant Sciencemadness threads