In Chemistry, a pipette is a temporary container which is used to transfer a solution from a container in another.

The pipette can be in plastic flexible as in Verre.

One distinguishes two types of pipettes:

• measured Pipette, whose capacity is fixed, and who allows to very precisely transfer a given volume (for example 20 ml);
• graduated Pipette, which as its name indicates it has a succession of graduations making it possible to measure transferred volume. However, the graduated pipette is intrinsically less precise than the measured pipette, and must thus be used to only transfer from volumes for which there does not exist measured pipette.

Certain pipettes require the use of a Propipette for the precision of the taking away: it is about an extension placed upstream of the pipette which controls the aspiration of solution. This propipette is actually a pear: during its compression, the solution is aspired; at the time of its depression, the solution is released.

Biology

In cellular Biology, one uses micropipettes called pipettes Pasteur, taking extremely low volumes. There exist even electronic micropipettes.

There exist also automatic pipettes, used inter alia in analytical Chimie and Molecular biology.

Simple: Pipette

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