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  Home > JCE Print > Journal of Chemical Education > Issues > 2002  > May  >
In the Classroom
Determination of the Natural Abundances of Krypton and Xenon Isotopes Using Mass Spectrometry: A Demonstration of Isotopes and the Basis of Atomic Mass
David N. Blauch, Merlyn D. Schuh, and Felix A. Carroll
Department of Chemistry, Davidson College, Davidson, NC 28035
Cover
May 2002
Vol. 79 No. 5
p. 584
Abstract
This paper describes the use of a gas chromatograph-mass spectrometer to demonstrate the existence of isotopes to students in an introductory chemistry course. Fragmentation reactions are avoided through the use of a noble gas (krypton or xenon) as the analyte. Students are able to readily identify the naturally occurring isotopes of the noble gas, and the quantitative mass spectrometric data may be analyzed to calculate the natural abundance of each isotope and the mean atomic mass of the noble gas.
More Information
*  Citation
 Blauch, David N.; Schuh, Merlyn D.; Carroll, Felix A. J. Chem. Educ. 2002 79 584.
*  Keywords
 Analytical Chemistry; Atomic Properties / Structure; Demonstrations; Isotopes; Krypton; Mass Spectrometry; Xenon
*  History
 Created:
Last Updated:		 April 1, 2002
March 16, 2005
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