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  Home > JCE Print > Journal of Chemical Education > Issues > 2001  > March  >
In the Laboratory
Determining the Percent Water in Organic Solvents Using the Zwitterionic Dimroth-Reichardt Betaine ET-30 Dye. An Industrially Relevant Application of a Previously Published Laboratory Experiment
Mark F. Vitha
Department of Chemistry, Drake University, 2507 University Avenue, Des Moines, IA 50311
Cover
March 2001
Vol. 78 No. 3
p. 370
Abstract
Recently in this Journal, Deng and Acree described the use of the solvatochromic dye ET-30 to teach the fundamental basis of UV-vis spectroscopy. A new experiment, which complements and extends the educational benefits of using ET-30 in undergraduate laboratories and provides a relevant industrial application of the theory described by Deng and Acree, is described here. ET-30 is used to determine the percent water in an organic solvent. This experiment, combined with a case study from Procter & Gamble's workshop "Professional Analytical Chemists in Industry", teaches students about the importance of dry organic solvents, the differences in diode array and scanning UV-vis spectrophotometers, the use of a wide variety of instrumental and wet-chemical analyses in answering analytical questions, and the application of the scientific approach to the solution of industrial chemical problems.
Supplement
A student handout for this experiment and a presentation of the Procter & Gamble case study are available.
*  Contents Student handout and P&G presentation are combined into the PDF file. The ZIP and SIT files contain only the student handout, JCE2001p0370W.doc (MS Word).
*  Download
JCE2001p0370W.pdf

JCE2001p0370W.zip

JCE2001p0370W.sit
More Information
*  Citation
 Vitha, Mark F. J. Chem. Educ. 2001 78 370.
*  Keywords
 Analytical Chemistry; Dyes; Instrumental Methods; UV-Vis Spectroscopy; Water / Water Chemistry; Laboratory Instruction
*  History
 Created:
Last Updated:		 February 6, 2001
August 31, 2005
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