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2003
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December
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In the Laboratory
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Cost-Effective Teacher
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Analytical Spectroscopy Using Modular Systems
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Brian M. Patterson, Neil D. Danielson, Gary A. Lorigan, and André J. Sommer
Department of Chemistry and Biochemistry, Molecular Spectroscopy Laboratory, Miami University, Oxford, OH 45056
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December 2003
Vol. 80 No. 12
p. 1460
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| Abstract |
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This article describes the development of three analytical spectroscopy experiments that compare the determination of salicylic acid (SA) content in aspirin tablets. The experiments are based on UV–vis, fluorescence, and Raman spectroscopies and utilize modular spectroscopic components. Students assemble their own instruments, optimize them with respect to signal-to-noise, generate calibration curves, determine the SA content in retail aspirin tablets, and assign features in the respective spectra to functional groups within the active material. Using this approach in the discovery-based setting, the students gain invaluable insight into method-specific parameters, such as instrumental components, sample preparation, and analytical capability. In addition, the students learn the fundamentals of fiber optics and signal processing using the low-cost CCD based spectroscopic components.
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| Supplement |
Instructions for the students, possible student answers to questions, and tips for success are available.
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 Contents |
JCE2003p1460W.doc (Microsoft Word)
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| More Information |
Citation |
Patterson, Brian M.; Danielson, Neil D.; Lorigan, Gary A.; Sommer, André J. J. Chem. Educ. 2003 80 1460.
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Keywords |
Analytical Chemistry; Fluorescence Spectrometry; Inquiry-Based / Discovery Method; Laboratory Equipment / Apparatus; Laboratory Instruction; Quantitative Analysis; Raman Spectroscopy; UV-Vis Spectroscopy
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History |
Created:
Last Updated: |
October 31, 2003
February 28, 2005
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| Home > JCE Print > Journal of Chemical Education > Issues >
2003
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December
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1460
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