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In infrared (IR) spectroscopy, the KBr pelleting method is a widely used technique for preparing solid samples. This method involves mixing a small amount of the solid sample, usually in the range of 1–2 mg, with a much larger quantity of potassium bromide (KBr), typically around 100–200 mg. KBr is chosen because it is transparent to infrared radiation over a wide spectral ___ _________ _____ _________ ________.
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