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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.), and through probes or sensors, amplifiers, analytical converters, 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. The development of instrumental analysis is extremely rapid, and the application prospect is extremely broad. The analyzer applies various new theories, new methods and new technologies of modern analytical chemistry, and integrates spectroscopy, quantum science, Fourier transform, calculus, fuzzy mathematics, biology, electronics, electrochemistry, laser, computer and software. Successfully applied to modern analytical instruments, developed atomic spectroscopy (atomic absorption spectroscopy, atomic emission spectroscopy, atomic fluorescence spectroscopy), molecular spectroscopy (UV, IR, MS, NMR, Flu), chromatography (GC, LC), spectroscopy Modern analytical instruments such as photometry, laser spectroscopy, Raman spectroscopy, flow injection analysis, polarography, ion selective electroplating, photometric analysis, etc. The application of computers has greatly improved the analytical capabilities of the instruments. Therefore, modern analytical instruments It has high sensitivity, good selectivity, low detection limit and good accuracy. It realizes the automation of analytical instruments and the continuous determination of samples in data processing and display of analytical results.