Introduction

Raman spectroscopy is an analysis method based on the scattering effect discovered by Indian scientist Raman. It analyzes the scattering spectra of different incident light frequencies to obtain information on molecular vibration and rotation, and applies it to the study of molecular structure. Raman spectroscopy analysis technology is a molecular structure characterization technology based on the Raman effect. Its signals come from the vibration and rotation of molecules. Different substances have different characteristic spectra, so Raman spectroscopy can be used for component analysis. Laser Raman spectroscopy analysis technology is fast and stable. It can perform non-destructive detection without sample preparation. It is suitable for aqueous solution analysis and is widely used in many fields such as medicine, safety, food, analytical chemistry and biology. This experiment uses 785nm Raman laser as the excitation light source to study the Raman spectrum of liquid samples as ethanol solution, and applies Raman spectroscopy technology to the component identification of plastic products.

Experiments

Raman laser testing experiment;

Raman probe principle and usage experiment;

Raman test system construction experiment;

Ethanol Raman spectroscopy measurement experiment;

Raman spectroscopy measurement experiment of plastic standard samples;

Standard sample database matching and identification experiments.

Experimental Knowledge

Rayleigh scattering, Raman scattering, Raman frequency shift, wave number, characteristic peaks, molecular vibration, elastic collision, inelastic collision, Stokes line, anti-Stokes line, fluorescence background spectrum.

Typical Testing

                  Standard Database                                       Characteristic peaks of ethanol

                      Raman Probe                                                    Raman Components