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The Chemical Educator

ISSN: 1430-4171 (electronic version)

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Abstract Volume 11 Issue 5 (2006) pp 323-326

Introduction to Capillary Electromigration Methods: Analysis of Pesticides by Capillary Zone Electrophoresis

Javier Hernández-Borges, Teresa M. Borges Miquel and Miguel Ángel Rodríguez-Delgado*

Department of Analytical Chemistry, Nutrition and Food Science, University of La Laguna, Avda. Astrofísico Fco. Sánchez s/nº, 38071, La Laguna, Tenerife, Canary Islands, Spain,
Received January 23, 2006. Accepted May 30, 2006.

Published online: 1 October 2006

Abstract. Capillary electrophoresis (CE) is a separation technique being increasingly taught at universities because it is gaining more importance in daily analyses, especially of proteomics and pollutants. Few laboratory experiments have been developed, however, that teach students this technique. In this work, we propose, as an introductory experiment using CE, the optimization of the separation of a group of five pesticides: three fungicides (Pyrifenox, Pyrimethanil and Cyprodinil) and two insecticides (Cyromazine and Pirimicarb) by capillary zone electrophoresis (CZE), in order to evaluate the different factors that influence the separation of the selected compounds (pH, ionic strength, separation voltage, etc.).

Key Words: Laboratories and Demonstrations; general chemistry; capillary electrophoresis; environmental chemistry; analytical chemistry; pesticides

(*) Corresponding author. (E-mail:

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Issue date: October 1, 2006

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