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  Home > JCE Print > Journal of Chemical Education > Issues > 2000  > October  >
In the Laboratory
Topics in Chemical Instrumentation
Analysis of Common Household Cleaner-Disinfectants by Capillary Electrophoresis
William P. Gardner and James E. Girard
Department of Chemistry, American University, Washington, DC 20016-8014
Cover
October 2000
Vol. 77 No. 10
p. 1335
Abstract
The use of capillary electrophoresis (CE) as an analytical technique in research, industrial, and commercial laboratories is growing rapidly. It is therefore very important to expose undergraduate instrumental analysis students to capillary electrophoresis. In this report we describe the CE analysis for benzalkonium compounds in common household cleaners and disinfectants. The surfactant nature of the benzalkonium compounds is the key consideration in performing the analysis, and modifications to the CE running buffer must be performed in order to successfully analyze the products. This experiment also illustrates the importance of (i) using peak areas corrected for variations in migration time to improve accuracy and (ii) using internal standards to improve the precision of capillary electrophoresis results.
Supplement
Detailed laboratory procedures are available as supplemental material.
*  Contents JCE2000p1335W.doc (Microsoft Word 97/98)
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*  Citation
 Gardner, William P.; Girard, James E. J. Chem. Educ. 2000 77 1335.
*  Keywords
 Analytical Chemistry; Electrophoresis; Instrumental Methods; Laboratory Instruction; Quantitative Analysis; Separation Science
*  History
 Created:
Last Updated:		 September 22, 2000
August 31, 2005
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