Analytical chemistry is an important branch of chemistry, and it is a science of analytical methods and theories about chemical information such as composition, content, structure and morphology of substances. It is to identify what components are contained in a substance, determine the relative content of various components, and study the molecular structure or crystal of the substance. The article introduces the development history, analytical methods, application fields and error elimination of analytical chemistry.

The related extension of the development history of analytical chemistry;

1, the first important stage

In the 1920s and 1930s, the theory of solution chemical equilibrium and kinetics in physical chemistry at that time, such as precipitation formation and coprecipitation, indicator action principle, titration curve and terminal error, catalytic reaction and induced reaction, and buffering action principle, greatly enriched the content of analytical chemistry and made it a step forward.

2. The second important stage

In the decades after the 1940s, around the Second World War, the development of physics and electronics promoted the development of various instrumental analysis methods and changed the situation that classical analytical chemistry was dominated by chemical analysis.

With the development of atomic energy technology and the rise of semiconductor technology, analytical chemistry is required to provide a variety of sensitive, accurate and fast analytical methods, such as semiconductor materials, some of which require a purity of more than 99.99999%. Under the impetus of the new situation, analytical chemistry has made rapid development.

The most remarkable feature is the wide application of various instrumental analysis methods and separation technologies.

3. The third important stage

Since the 1970s, the arrival of the information age marked by computer application has prompted analytical chemistry to enter the third reform period.

Due to the development of life science, environmental science and new material science, and the perfection of basic theory and testing means, modern analytical chemistry can provide comprehensive information on the composition, content, structure, distribution and morphology of various substances, which can solve the problems of micro-area analysis, thin-layer analysis, nondestructive analysis, instantaneous tracking, online monitoring and process control in the past.

Analytical chemistry has widely absorbed the latest achievements of contemporary science and technology, and has become one of the most dynamic disciplines.