Page 81 - Tandem Techniques
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considerable skill and, unless the analyst is also an experienced spectroscopist, verification should be
sought to confirm any conclusions that are drawn from the spectra of an unknown substance.
Figure 2.9
An IR Correlation Chart for Interpreting IR Spectra
IR Spectroscopy Instrumentation
There are two basic types of IR spectrometer in use today: the simple grating dispersion IR
spectrometer and the Fourier transform IR spectrometer (FTIR). The former is rapidly being replaced
by the latter which is much faster and it is likely that in a few years only the FTIR instrument will be in
use with tandem systems. However, as both are still in use at this time, both systems will be described.
The two spectrometers are quite different in design and function.
