Explanation

A spectroscopic technique that studies the microstructure of molecules or substances by using the scattering spectrum obtained from the non elasticity collision between photons and molecules. The abscissa of Raman spectroscopy is Raman shift. Different molecular vibrations and different crystal structure have different characteristic Raman shifts, which can be used for qualitative analysis of material structure; The relative intensity of the spectrum can determine the content of a specific component and can be used for quantitative analysis. The laser Raman spectrometer consists of four parts: a laser, a dispersive monochromator, a photon detector, a computer control and data processing system. It can directly measure solid, film, powder, liquid and other samples without sample preparation. Raman spectroscopy beam cannot be used to detect molecules that have no change in polarizability and are Raman inactive; The Raman signal of black or dark substances with strong absorption of laser is very weak, which is the limitation of Raman spectroscopy.

Classification