The use of KBr pellets is primarily for the analysis of solid samples in infrared (IR) spectroscopy. KBr pellets are prepared by mixing a small amount of the sample with potassium bromide (KBr) and compressing the mixture under high pressure to form a transparent pellet. This technique is favored due to its ability to adjust the pathlength of the compound being analyzed, which offers a significant advantage over newer methods like attenuated total reflectance (ATR). The transparency of the KBr pellet allows infrared radiation to pass through, facilitating the accurate detection of the sample's IR spectrum with sharp peaks, good intensity, and high resolution. This method is widely used in various fields including pharmaceutical, biological, nutrition, and spectrographic operations.
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