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  Home > JCE Print > Journal of Chemical Education > Issues > 2001  > February  >
In the Classroom
Applications and Analogies
The Escalator--An Analogy for Explaining Electroosmotic Flow
Andrew J. Vetter and Garrett J. McGowan
Department of Chemistry, Alfred University, Alfred, NY 14802
Cover
February 2001
Vol. 78 No. 2
p. 209
Abstract
Capillary electrophoresis (CE) is an instrumental technique that is rapidly gaining popularity for use in the undergraduate laboratory. As a result, it becomes necessary to integrate the topic of CE into the junior/senior-level instrumental analysis course. We have developed an analogy of people on an escalator for teaching the concept of electroosmotic flow. The moving escalator is analogous to the overall bulk flow of solution through the capillary (electroosmotic flow) and partly responsible for the separation of species using CE. Students can predict the separation of people on the escalator and then correctly predict the outcome of a CE separation by using what they have learned through the analogy.
More Information
*  Citation
 Vetter, Andrew J.; McGowan, Garrett J. J. Chem. Educ. 2001 78 209.
*  Keywords
 Instrumental Methods; Separation Science; Teaching / Learning Aids; Electrophoresis
*  History
 Created:
Last Updated:		 December 22, 2000
August 31, 2005
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