The Escalator—An Analogy for Explaining Electroosmotic Flow
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Andrew J. Vetter [1] ; Garrett J. McGowan [1]
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[1] Alfred University
Alfred University
Town of Alfred, Estados Unidos
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- Localización: Journal of chemical education, ISSN 0021-9584, Vol. 78, Nº 2, 2001, pág. 209
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
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.
