Abstract: Spectroscopic techniques play a key role in the everyday work of the pharmaceutical analyst. In addition to the normal use of the various spectroscopies for simple, routine analyses, a pharmaceutical analytical chemist might use spectroscopy to perform a host of additional functions. These might include, for example, the characterization of a polymorphic substance by either X-ray diffraction or nuclear magnetic resonance spectroscopy, the identification of a foreign material in a tablet dosage form by infrared microspectroscopy, or the selection of a wavelength for liquid chromatographic analysis by photodiode array ultraviolet-visible spectroscopy. The following presentation is meant to acquaint the non-pharmaceutical chemist with some of the ways spectroscopy is utilized in the pharmaceutical analysis research and development laboratory.!0
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