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  Home > JCE Print > Journal of Chemical Education > Issues > 2004  > December  >
In the Laboratory
Topics in Chemical Instrumentation
Capillary Electrophoresis Analysis of Cations in Water Samples. An Experiment for the Introductory Laboratory
Christopher J. Pursell, Bert Chandler, and Michelle M. Bushey
Department of Chemistry, Trinity University, San Antonio, TX 78212-7200
Cover
December 2004
Vol. 81 No. 12
p. 1783
Abstract
Capillary electrophoresis is gradually working its way into the undergraduate laboratory curriculum. Typically, experiments utilizing this newer technology have been introduced into analytical or instrumental courses. We have introduced an experiment into the introductory laboratory that utilizes capillary electrophoresis to identify and quantitate cations in common water samples. This experiment can be done in a lab, as a "dry-lab", or as an in-class exercise. Students explore a number of basic separation topics and work with figures of merit for real and meaningful samples. We have adopted a strategy where students encounter various instruments and methods of analyses multiple times throughout the curriculum. The level of sophistication in the exposures increases with the experience level of the students. Through this repeated exposure students will gain a better and fuller understanding of these methods than they would with a single exposure to the technique in the analytical or instrumental laboratory. This is the first of at least four experiments that our chemistry and biochemistry students encounter involving capillary electrophoresis methods.
Supplement
The student handout, including prelab problems and the report form, electropherograms of the water samples and standards, and the instructor handout and notes are available.
*  Contents JCE2004p1783W.doc (Microsoft Word)
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*  Citation
 Pursell, Christopher J.; Chandler, Bert; Bushey, Michelle M. J. Chem. Educ. 2004 81 1783.
*  Keywords
 Analytical Chemistry; Electrophoresis; General Chemistry; Laboratory Instruction; Quantitative Analysis; Separation Science; Statistics / Data Analysis; Water / Water Chemistry
*  History
 Created:
Last Updated:		 November 1, 2004
November 9, 2004
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