Friday, February 22, 2019

Difference between IR and FTIR

The major difference between the IR and FTIR is that IR uses a monochromatic system, whereas the FTIR uses a Michelson interferometer. Instead of shining a monochromatic light beam into the sample, this system shines a beam from several frequencies of light at once and determines how much of that beam is absorbed by the sample.

IR stands for Infrared spectroscopy and FTIR stands for Fourier Transform Infrared spectroscopy. Infrared spectroscopy and Fourier Transform Infrared spectroscopy is spectroscopy, which is related to the infrared region of the electromagnetic spectrum, which is light with a long wavelength and low frequency compared to visible light. It covers many techniques, which are based mostly on absorption spectroscopy. Like all spectroscopic techniques, it can be used to identify and study of analytes or components.
Difference between IR and FTIR

IR spectroscopy is a significant technique in organic chemistry. This is a simple technique to identify the presence of functional groups in a molecule. In addition, to verify the identity of a pure compound or specific impurities, the absorption can utilize the unique collection of the band.
IR spectroscopy gets absorption of a monochromatic IR light at a time and draws the spectrum, whereas, in FTIR, Multi-chromatic takes a summarized absorption of light and distributes it to create a spectrum using FTIR. This is a faster and more effective technique.
Here are some points of difference between IR and FTIR.
  • IR takes a single spectrum.
  • FTIR employs an interferometer and takes a number of scans.
  • IR used monochromatic light whereas FTIR used polychromatic light.
  • FTIR scans up to 50 times in a minute and giving better resolution.
  • In FTIR, all analytes can be identified with a single measurement and the interferences are resolved.
  • FTIR is a fast technique than IR.
  • Sample preparation in the traditional IR is time-consuming, while nowadays in FTIR uses Attenuated Total Reflection (ATR), Therefore, there is no need to prepare the sample.
The FT-IR spectrometers are more modern, it has many applications and performance advantages over dispersive instrument. The major advantages of upgrading from existing infrared instrument to FT-IR include rapid analysis, high quality spectrum, reproducibility, ease of use and low maintenance.



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