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  Home > JCE Print > Journal of Chemical Education > Issues > 2005  > February  >
In the Classroom
JCE DigiDemos: Tested Demonstrations
A Demonstration of Sample Segregation
Mark D. Fritz
Department of Chemical Technology, University of Cincinnati, Cincinnati, OH 45206

checked by Stephen B. Brumbach
Department of Chemistry, Western Wyoming Community College, Rock Springs, WY 82902-0428

JudithAnn R. Hartman
Department of Chemistry, United States Navel Academy, Annapolis, MD 21402-5026

Cover
February 2005
Vol. 82 No. 2
p. 255
Abstract
Handling a solid mixture can segregate its particles by size. A simple, visually-compelling demonstration shows students how stirring or pouring can segregate a mixture and create a nonuniform sample. The demonstration uses colored beads and other inexpensive, readily-available materials. The demonstration has proven useful for illustrating the importance of sample handling for students studying analytical chemistry and environmental chemistry.
More Information
*  Citation
 Fritz, Mark D. J. Chem. Educ. 2005 82 255.
*  Keywords
 Analytical Chemistry; Demonstrations; Environmental Chemistry; Quantitative Analysis; Solids; Statistics / Data Analysis
*  History
 Created:
Last Updated:		 January 4, 2005
January 12, 2005
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