In material analysis using FTIR, what conditions must be met by the sample so that it can be measured or analyzed using both the reflectance method and the KBr pellet method ?
Answer -
Infrared spectroscopy incorporates several types of measurement method, such as the diffuse reflection method and attenuated total reflection method. The measurement method used must be selected according to the sample form. From the sample viewpoint, it is possible to use more than one method to measure an infrared spectrum for a single sample. m.
FTIR -
FTIR stands for Fourier transform infrared, the preferred method of infrared spectroscopy.
When IR radiation is passed through a sample, some radiation is absorbed by the sample and some passes through (is transmitted).
KBr Pellet Method.
This method exploits the property that alkali halides become plastic when subjected to pressure and form a sheet that is transparent in the infrared region.
Potassium bromide (KBr) is the commonest alkali halide used in the pellets
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