Dispersive & Fourier Transform IR Spectrophotometers

This video describes the instrumentation in IR spectroscopy. The working principle of dispersive (Double beam) IR spectrophotometer has been discussed. The functions of different parts IR source, beam splitter, Monochromator, Diffraction grating, detector have been discussed by block diagram. The principle of thermocouple detector, amplifier and recorder has also explained. The Fourier transform IR spectrophotometer has also been described by block diagram. The principle of interferometer has been discussed. The interferogram has been discussed and how it is converted into IR spectra has been explained. The advantages of FTIR over dispersive instrument have been well elaborated.