Instrumental analysis is the use of experimental phenomena that can directly or indirectly characterize various properties of substances (such as physical, chemical, physiological properties, etc.). An analytical method for information on the composition, content, distribution or structure of a substance. That is to say, instrumental analysis is an analytical method that uses the basic principles of various disciplines and uses advanced technologies such as electricity, optics, precision instrument manufacturing, vacuum, and computer to detect the chemical properties of substances. Therefore, instrumental analysis is a highly comprehensive branch of science and technology that reflects the interdisciplinary, high degree of integration of science and technology.