Encyclopedia > Test tube

  Article Content

Test tube

A test tube is a kind of laboratory glassware, composed of a fingerlike length of glass tubing, open at the top, usually with a rounded lip at the top, and a rounded 'U' shaped bottom.
They range in size from a couple inches to several inches long, from a few millimeters to a couple centimeters in diameter. They are designed to allow easy heating of samples, to be held in a flame, and often are made of expansion resistant glasses, such as Pyrex ®.

Tests tubes are often preferred above beakers when multiple small chemical or biological samples have to be handled and/or stored.

Vacutainers are a type of test tube that can be used for both collection and storage of blood.

See also: In vitro



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
Sterling

... Ilay (1682-1761), first governor of the bank. Clydesdale Bank notes in circulation are: 5 pound note featuring Robert Burns on the front and a vignette of a ...