Feeding bottle (laboratory)

Feeding bottle with glass olive

Feeding bottle with plastic lens

Suction bottle with Büchner funnel (with inserted round filter paper) with connected red vacuum hose

Suction bottle as a laboratory device

A feeding bottle is a kind of thick-walled Erlenmeyer flask with a side opening. It is used for filtration under reduced pressure , where it serves as a collecting vessel for the filtrate. A vacuum pump (usually in the form of a water jet pump ) with a possible cold trap is connected to the side opening . The filter ( suction filter or frit ) is situated at the upper opening, where it by means of rubber collars and conical rubber gaskets (called Guko) is tightly connected to the suction flask.

A Wittscher pot can also be used instead of a feeding bottle . The feeding bottle is also called the Büchner bottle , in memory of the German chemist Ernst Büchner .

literature

• DIN EN ISO 6556: 2013-02 Laboratory glassware - Suction bottles (ISO 6556: 2012); German version EN ISO 6556: 2012 , February 2013

Web links

Commons : Büchner flasks  - collection of images, videos and audio files

Individual evidence

1. ^ Brockhaus ABC Chemie , VEB FA Brockhaus Verlag Leipzig 1965, p. 1233.