Mohr pipette

From Wikipedia, the free encyclopedia
Jump to: navigation, search

A Mohr pipette, also known as a graduated pipette, is a type of pipette used to measure the volume of the liquid dispensed, although not as accurately as a volumetric pipette.[1] These use a series of marked lines (as on a graduated cylinder) to indicate the different volumes.[2] They come in a variety of sizes, and are used much like a burette, in that the volume is found by calculating the difference of the liquid level before and after.

The last graduation mark is some distance from the tip, to avoid errors in measuring the narrower volume of the nozzle.[3] It was invented by Karl Friedrich Mohr, the father of volumetric analysis.

References[edit]

  1. ^ Robert Bruce Thompson (2008), Illustrated guide to home chemistry experiments: all lab, no lecture, O'Reilly Media, p. 24, ISBN 978-0-596-51492-1, retrieved 2011-04-02 
  2. ^ Water quality - Google Books, Water Supply Operations Training Series (3 ed.), American Water Works Association, 2003, p. 75, ISBN 978-1-58321-232-5, retrieved 2011-04-02 
  3. ^ Mukherjee (2001). Med Lab.Technology. 1. Tata McGraw-Hill Education. p. 67. ISBN 978-0-07-463260-4. Retrieved 2011-04-02.