What makes potassium chloride a good reagent to use when making samples for IR spectroscopy?

Question

Question

Answer 1

Answer #1

KBr is used because

1) to exploit the property that alkali halides become plastic when subjected to pressure and form a sheet that is transparent in the IR region.

2) Potassium bromide is typically used as the window material because it is transparent in the IR, between 4000–400 cm-1.

3) Alternatively, samples can be contained within a KBr matrix and pressed to form a pellet that is then analysed.

Answer 2

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