Monday, 23 June 2014

Principle of FTIR Spectroscopy

Basic principle of FTIR Spectroscopy are as follows:-

  • FTIR spectroscopy is used to identify the functional group which is present in certain molecules.
  • FTIR is one of the widely used method which is also know as Fourier Transform Infrared Spectroscopy.
  • In this method of infrared spectroscopy , radiation (Infra red) is passed through the sample.
  • Some of the radiation is absorbed by the sample while some of the radiation is transmitted.
  • Now spectrum which is produced , represents molecular transmission and molecular absorption creating molecular fingerprint of a sample.
  • The fingerprint region is unique for also samples, no two samples have same fingerprint region.
  • The fingerprint region shows different absorption peaks with different vibration frequency between bonds of an atoms in the sample.
  • Hence with this property unique molecule can be identified.
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