16: An Introduction to Infrared Spectrometry
- Page ID
- 333369
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- 16.1: Theory of Infrared Absorption Spectrometry
- To absorb an infrared photon, the absorbing species must experience a change in its dipole moment, which allows the oscillation in the photon's electrical field to interact with an oscillation in charge within the absorbing species. If the two oscillations have the same frequency, then absorption is possible. In this section we consider classical and quantum mechanical models for vibrational spectrscopy.
- 16.2: Infrared Sources and Transducers
- Instrumentation for IR spectroscopy requires a source of infrared radiation and a transducer for detecting the radiation after it passes through the sample. Common sources and transducers are reviewed here.
- 16.3: Infrared Instruments
- Instrumentation for infrared spectroscopy use one of three common optical benches: non-dispersive instruments, dispersive instruments, and Fourier transform instruments. As we have already examined non-dispersive and dispersive instruments in Chapter 13, and because they are no longer as common as they once were, we give them only a brief consideration here. Fourier transform instruments, which dominate the current marketplace receive more detailed treatment.