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  Home > JCE Print > Journal of Chemical Education > Issues > 1999  > December  >
In the Laboratory
Separation of Polyaromatic Hydrocarbons Using 2-Dimensional Thin-Layer Chromatography. An Environmental Chemistry Experiment
Geoffrey T. Crisp and Natalie M. Williamson
Department of Chemistry, University of Adelaide, Adelaide, South Australia 5005, AUSTRALIA
Cover
December 1999
Vol. 76 No. 12
p. 1691
Abstract
An experiment for an undergraduate environmental chemistry course is described. Students are given a soil sample from which they extract two (previously added) polyaromatic hydrocarbons (PAHs) using a Soxhlet apparatus. They determine the identity of the unknown PAHs by comparing the 2-dimensional thin-layer chromatograms of the soil sample extract and a standard solution, both of which they must run themselves. Definitive identification is given by Rf values and fluorescence colors (under 254-nm UV light). The experiment is suitable to be performed by large classes (ca. 30 students) and is, on average, completed in three hours.
Supplement
A list of equipment and supplies, notes for the instructor, and a handout with instructions for students are provided.
*  Contents
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*  Citation
 Crisp, Geoffrey T.; Williamson, Natalie M. J. Chem. Educ. 1999 76 1691.
*  Keywords
 Teaching / Learning Aids; Aromaticity / Aromatics; Chromatography; Environmental Chemistry; Laboratory Instruction
*  History
 Created:
Last Updated:		 November 10, 1999
November 22, 2005
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