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  Home > JCE Print > Journal of Chemical Education > Issues > 1997  > May  >
In the Laboratory
Filtrates and Residues
Analysis of Mouthwash
Eleanor Siegrist and Guy Anderson
Hollidayburg Area High School, Holidaysburg, PA 16648
Cover
May 1997
Vol. 74 No. 5
p. 567
Abstract
Students analyze commercial mouthwash solutions in order to identify the dyes which are present and determine the alcohol content. After lowering the alcohol content by heating, a solid phase extraction tube is used to extract and separate the dyes. A spectrophotometer is used to determine the absorbent maximum in each sample of eluate and the value obtained is compared with a list of standard values. A gas chromatograph is used to determine the concentration of alcohol in the original mouthwash sample. The project was made possible through a van project which carries the instruments and resource teachers to the author's high schools.
More Information
*  Citation
 Siegrist, Eleanor ; Anderson, Guy. J. Chem. Educ. 1997 74 567.
*  Keywords
 Introductory/High School Chemistry, Laboratory Instruction, Outreach, Consumer Chemistry, Chromatography, UV-Vis Spectroscopy, Instrumental Methods, Dyes
*  History
 Created:
Last Updated:		 July 28, 1999
June 23, 2005
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