Introduction to Infrared Spectroscopy in Polymer Applications

For a long time, analysts from all walks of life have been looking forward to an analytical method that can quickly feedback the quality of raw materials, intermediate products and products. The near-infrared spectroscopy technology, which developed rapidly in the late 1980s, met the above requirements to a certain extent, and attracted the attention of many industry personnel.

Near-infrared spectroscopy is an indirect analysis method, and its organic combination of spectral measurement technology, chemometric technology and basic measurement technology can quickly and efficiently conduct qualitative and quantitative analysis of samples. Compared with the traditional analysis technology, the near-infrared spectroscopy analysis technology can simultaneously measure several to a dozen properties or concentration data of a sample within a few seconds to a few minutes by simply measuring the near-infrared spectrum of the sample. Moreover, the amount of the tested sample is small, non-destructive, non-polluting, and has the characteristics of high efficiency, rapidity, low cost and green. Therefore, near-infrared spectroscopy is widely used in petrochemical, agricultural, beverage, pharmaceutical qualitative and quantitative analysis and many other fields. Traditional quantitative analysis methods include ultraviolet, infrared, liquid phase, thin-layer scanning, and mass spectrometry, etc. These methods require complex preprocessing steps such as extraction and separation, and the determination cost is high and the efficiency is low; qualitative analysis methods include thin-layer, microscopic methods. Identification, etc., requires high operating skills and complicated operations.