In ir analysis why kbr background is required

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1

During ir analysis why kbr background is required please tell me sir

2

The KBr Pellet Method exhibits the property that alkali halides become plastic when subjected to pressure and form a sheet that is transparent in the Infrared region.
The KBr does not show any absorption spectrum in IR region because it has a 100% transmission window in the range of wave number (4000-400 cm-1) at the FTIR spectroscopy with electronegativity of 2.0 based on the Pauling scale.
Therefore, Potassium bromide (KBr) is the commonest alkali halide used in the pellets during FTIR analysis.

3

Thank you sir

4

You are welcome…