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
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Mark F. Vitha [1]
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[1] Drake University
Drake University
Township of Lee, Estados Unidos
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- Localización: Journal of chemical education, ISSN 0021-9584, Vol. 78, Nº 3, 2001, pág. 370
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
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 and 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.
