Infrared spectroscopy absorption method is a classic fast analysis method. It is an analytical measurement technology that integrates spectral measurement technology, chemometrics, and computer technology, which can quickly and quantitatively analyze samples.

Polypropylene melt blown non-woven fabric material has been widely used in the fields of medical and health protection, as well as air purification filters, such as PM2.5 masks and disposable medical masks. Usually, in order to improve the filtration efficiency of materials, fiber fineness is reduced and fiber tightness is increased, but the filtration resistance of materials is greatly increased. Conduct scanning infrared spectroscopy tests on polypropylene melt blown polarizing filter materials separately, analyze the impact of corona charging on polypropylene melt blown materials, and lay the foundation for finding methods to improve the polarizing effect in the future.

The traditional detection methods for the content of fatty acid methyl esters are mostly liquid phase or chemical titration. Time consuming and labor-intensive, with high costs. By using a Fourier transform infrared spectrometer and selecting ester absorption peaks, quantitative analysis of fatty acid methyl esters can be performed. The testing is fast, the method is simple, and the data is accurate. The country has corresponding standards as support (the 2015 standard is the arbitration standard)

The main purpose of this experiment is to detect the silica content in kaolin, using the iCAN 9 Fourier transform infrared spectrometer transmission attachment. Test method: Resolution of 4cm-1, spectral scanning times of 32. Silicon dioxide in clay Select corresponding standard samples to draw standard curves, use infrared spectroscopy to draw working curves with a certain concentration of silica standard substance as a reference, reduce measurement errors. This method not only effectively reduces the influence of matrix effects, but also has the advantages of simple and fast sample processing, wide testing linear range, good reproducibility, accurate and reliable results, and relative standard deviation

Infrared spectroscopy utilizes the selective absorption of electromagnetic radiation by substances in the infrared spectral region to determine their molecular structure, thereby achieving qualitative identification of compounds.

The use of infrared spectroscopy to detect the content of phenothiazine in the high complex of phenothiazine by-products is mainly based on the quantitative analysis of the characteristic absorption of phenothiazine drugs (including phenothiazine) under infrared spectroscopy.