二、固体分散剂：压片法最常见是 溴化钾 KBr压片，KBr作为固体分散剂，高压下易于晶型转换，且中红外区基本无吸收，KBr需采用光谱纯，对KBr干燥可翻阅我的前文《水和二氧化碳红外光谱》。除了用KBr外，还可不可以用其他固体分散剂？

Powders, being examined by Infrared Spectroscopy, in transmission, are generally prepared by mulling in liquid paraffin (Nujol), or by grinding with potassium bromide (KBr) powder. The latter is then pressed into a disk.

KBr（溴化钾）圆盘法是红外（IR）光谱学中广泛使用的一种技术，用于制备固体样品以供分析。 这种方法是将少量样品与 KBr 粉末混合，在高压下将混合物压成透明圆盘，然后使用红外光谱分析圆盘。 KBr 盘法尤其适用于分析难以溶解或不适合其他制备技术的固体样品。 KBr 圆片的透明度允许红外辐射通过，从而能够检测样品的分子振动，并提供有关其化学结构的宝贵信息。 KBr 盘法的主要目的是制备固体样品，以便进行红外光谱分析。 这种方法尤其适用于不溶于普通溶剂或 …

KBr 圆盘，也称为溴化钾圆盘，是一种广泛用于红外 (IR) 光谱的特殊样品制备技术。它包括将样品与精细研磨的溴化钾 (KBr) 粉末混合，在高压下压制混合物以形成透明颗粒，然后使用红外光谱对其进行分析。

KBr（溴化钾）圆片广泛应用于红外（IR）光谱分析，因为它对红外辐射是透明的，并且为制备固体样品提供了一种简单有效的介质。KBr 具有化学惰性，易于处理，与样品混合后可形成清晰、均匀的基质，从而获得准确、可重复的红外光谱。

2017年11月1日 · Absorbed water interference in KBr is finally eliminated from important regions of FTIR spectra. A novel chemometric method corrects spectra in KBr disks by eliminating water interference. An R-matrix model was solved via exponential decay kinetic modeling of the KBr water absorption.

KBr pellets/disks (for solid samples) In order to prepare a KBr pellet, follow the procedure given below: Sample/KBr ratio. The concentration of the sample in KBr should be in the range of 0.2 to 1 percent. The pellet is much thicker than a liquid film, hence a lower concentration in the sample is required (Beer's Law).

4. KBr pellets/disks (for solid samples) In order to prepare a KBr pellet, follow the procedure given below: Chemistry Analytical Lab FT-IR Spectroscopy Sample preparation for FT-IR

A KBr disc, also known as a potassium bromide disc, is a specialized sample preparation technique widely used in infrared (IR) spectroscopy. It involves mixing a sample with finely ground potassium bromide (KBr) powder, pressing the mixture under high pressure to form a transparent pellet, and then analyzing it using IR spectroscopy.

2022年5月10日 · To summarize, KBr is optically transparent in the fingerprint region of IR spectroscopy and hence is used as a carrier in the form of a disk or pellet. Structural determination of sensitive biomolecules like proteins was possible by employing FTIR and the KBr disk technique, especially in determining their primary and secondary structures.