FTIR Infrared Spectrometer
Infrared Spectrometry (FTIR)
Infrared spectroscopy (FTIR) is a method that scientists use to determine the structure of molecules by absorbing characteristic infrared radiation. Infrared spectrum is a molecular vibrational spectrum. When exposed to infrared radiation, sample molecules selectively absorb radiation of specific wavelengths, which causes a change in the dipole moment of the sample molecules. As a result, the vibrational energy level of the sample molecules is shifted from the ground state to the excited state. Therefore, by analyzing the infrared spectrum, a lot of structural information about a molecule can be easily obtained.
Most molecules, except for a few diatomic molecules with identical nuclei such as O2, N2, and Cl2, are infrared active due to the zero polar change in the vibration and rotation of these molecules. What makes infrared absorption spectroscopy even more useful is the fact that it is capable of analyzing all types of gaseous, liquid, and solid samples. The region used for infrared absorption spectroscopy is 4000 ~ 400 cm-1 because the absorption radiation of most organic compounds and inorganic ions is in this region.
Application of Infrared Spectrometer (FTIR)
FTIR spectrometers (Fourier Transform Infrared Spectrometer) are widely used in organic synthesis, polymer science, petrochemical engineering, pharmaceutical industry and food analysis. In addition, since FTIR spectrometers can be arranged on chromatography, the mechanism of chemical reactions and the detection of unstable substances can be investigated with such instruments.
Advantage of Infrared Spectrometer (FTIR)
FTIR spectrometers have several outstanding advantages:
1) The signal-to-noise ratio of the spectrum is significantly higher than that of previous generation infrared spectrometers.
2) The wavenumber accuracy is high
Due to these advantages, FTIR spectrometers have replaced IR scattering spectrometers.
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