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  Home > JCE Print > Journal of Chemical Education > Issues > 1997  > September  >
In the Laboratory
Quantitative Determination of Caffeine in Beverages Using a Combined SPME-GC/MS Method
Janusz Pawliszyn, Min J. Yang, and Maureen L. Orton
IUniversity of Waterloo Department of Chemistry, The Guelph-Waterloo Center for Graduate Work in Chemistry, Waterloo, Ontario N2L 3G1, CANADA
Cover
September 1997
Vol. 74 No. 9
p. 1130
Abstract
Solid-phase microextraction (SPME) combined with gas chromatography/mass spectrometry (GC/MS) has been applied to the analysis of various caffeinated beverages. Unlike the current methods, this technique is solvent free and requires no pH adjustments. The simplicity of the SPME-GC/MS method lends itself to a good undergraduate laboratory practice. This publication describes the analytical conditions and presents the data for determination of caffeine in coffee, tea, and coke. Quantitation by isotopic dilution is also illustrated.
More Information
*  Citation
 Pawliszyn, Janusz; Yang, Min J.; Orton, Maureen L. J. Chem. Educ. 1997 74 1130.
*  Keywords
 Chromatography, Caffeine, Mass Spectrometry, Quantitative Analysis, Analytical Chemistry, Instrumental Methods, Food Science, and Separation Science
*  History
 Created:
Last Updated:		 July 28, 1999
June 23, 2005
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