NIRmenetelmiä

NIRmenetelmiä refers to methods utilizing Near-Infrared (NIR) spectroscopy. NIR spectroscopy is a spectroscopic technique that measures the absorption of light in the near-infrared region of the electromagnetic spectrum, typically ranging from 700 to 2500 nanometers. This region of the spectrum is often associated with overtones and combinations of fundamental molecular vibrations, particularly those involving C-H, N-H, and O-H bonds.

The principle behind NIRmenetelmiä is that different chemical compounds absorb and scatter NIR light differently based on their molecular structure and composition. By analyzing the pattern of absorbed and reflected light, it is possible to identify and quantify the presence of various substances in a sample. This is achieved by using a light source to illuminate the sample and a detector to measure the reflected or transmitted light. The resulting spectrum, a plot of light intensity versus wavelength, acts as a unique fingerprint for the sample.

NIRmenetelmiä are widely applied across various fields due to their non-destructive nature, rapid analysis capabilities, and minimal sample preparation requirements. In agriculture, they are used for analyzing the quality of grains, fodder, and fruits, determining moisture content, protein levels, and fat content. In the pharmaceutical industry, NIR spectroscopy is employed for raw material identification, quality control, and formulation analysis. It also finds applications in the food industry for product authentication, ripeness assessment, and ingredient analysis, as well as in the polymer industry for material characterization. The development of chemometric models, statistical techniques that correlate spectral data with physical or chemical properties, is crucial for extracting meaningful information from NIR spectra.