Gas chromatography-mass spectrometry From the chromatogram, the chromatographic peak is the result of the components running in the chromatographic column, and it is the basis for judging what substances and contents of the components are. The chromatographic method is based on the moving speed and size of the chromatographic peaks to get the qualitative and quantitative analysis results of the components.

Fourier infrared experiment (FT-IR) It is mainly composed of infrared light source, diaphragm, interferometer (beam splitter, moving mirror, fixed mirror), sample chamber, detector and various infrared reflectors, lasers, control circuit boards and power supplies. The samples can be qualitatively and quantitatively analyzed. They are widely applied in the fields of medicine, chemistry, geology, mining, petroleum, coal, environmental protection, customs, gemstone identification, criminal investigation and identification.

Retarding agent - positive liquid dyeing Using three kinds of cationic dyes, it is better for dyeing uniform with slower dye rate at low temperature and uniform rate at high temperature. The color of residue liquid darker at low temperature and lighter at high temperature is better.