Accurate Sample Preparation: Application and Techniques of Infrared Tablet Press in Potassium Bromide Tablet Production

In the field of infrared spectroscopy analysis, precise sample preparation is the core link to ensure the reliability of detection results, and infrared tablet presses play an important role in the preparation of potassium bromide (KBr) tablets. Potassium bromide has excellent transparency in the mid infrared region, making it an ideal substrate for preparing solid sample flakes. The quality of its flakes directly affects the resolution and accuracy of spectral signals. The infrared tablet press accurately controls the pressure, holding time, and demolding speed to compress the mixed powder of potassium bromide and the sample into thin sheets with uniform thickness, no cracks, and high transparency, providing a stable detection carrier for subsequent infrared spectral scanning.

In practical applications, mastering key techniques is the key to improving sample preparation accuracy: firstly, it is necessary to ensure the dryness and fineness of potassium bromide powder, to avoid the occurrence of bubbles or delamination in the tablet due to uneven moisture or particles; Secondly, the ratio of the sample to potassium bromide needs to be precisely controlled according to the sample concentration, usually using a ratio of 1:100 to 1:200 for mixing and grinding to ensure the signal-to-noise ratio of the spectral signal; In addition, the pressure setting (usually 8-15 tons) and holding time (30 seconds to 2 minutes) during the compression process need to be adjusted according to the characteristics of the sample. Insufficient pressure can easily cause the flakes to loosen, while excessive pressure may cause changes in crystal structure, affecting the authenticity of the spectrum. By standardizing the operation and optimizing the techniques of infrared tablet press, sample preparation errors can be effectively reduced, providing high-quality experimental basis for material composition analysis, structural identification and other research.