Fourier Transform Infra-red (FTIR) spectroscopy refers to an experimental technique for collecting Infra-red spectra. Instead of recording the amount of energy absorbed as the frequency of the infra-red light is varied, the sample is exposed to a single pulse of infra-red light and the resulting signal observed. By performing a mathematical Fourier Transform on this response, a spectrum identical to that from conventional infra-red spectroscopy can be derived.
FTIR spectrometers are cheaper than conventional spectrometers because it is not necessary to vary the frequency of the infra-red light in a carefully controlled manner. In addition sampling time is smaller for the FTIR technique. This allows multiple samples to be collected and averaged together resulting in an improvement in sensitivity. Because of its various advantages, virtually all modern infra-red spectrometers are of the FTIR variety.
|
![[Home]](wikipedia.png)