The Pipette reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Pipette

Pipette

A pipette is a glass tube used for the delivery of a measured quantity of liquids. There are two kinds of pipettes, a kind with a bulbous middle section that has a single mark for the quantitative delivery of a single volume of liquid each time, and another that has many graduated marks, much like a graduated cylinder, that can deliver moderately accurate volumes (to within a few percent) of liquids in variable amounts.

A pipette used for the delivery of small fractions of a milliliter of liquid is called a micropipette. Many methods are employed in measuring small amounts of liquids but air deplacement is the most popular.

Rainin (a division of Mettler Toledo) is the world's largest developer & supplier of Pipettes.

Types

There are various types of pipettes:

• A Pasteur pipette is a cotton-plugged glass tube drawn out to a fine tip, used for the sterile transfer of small volumes of fluid.

See also: laboratory glassware, chemistry

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