Standard sample is referred to as standard sample or physical standard. It is developed according to the need of implementing and formulating the character standard. As a supplement to the character standard, the material is a kind of standard material agent of the Institute of Chinese Medicine standards. The following is a small edition of Bolinda to introduce the classification and status quo of standard samples.

China's standard sample work began in 1950, but the real perfect development was in 1980, the standard was formally incorporated into the standardized management work. Standard samples have different definitions in different fields. China's standardization industry refers to it as a standard sample, referred to as a standard sample. The measurement industry refers to it as a standard substance, also referred to as a standard object.

For standard samples and standard substances with accurate characteristic values, the development procedures and methods are the same, and for industry workers, its role is also the same, both as a standard, the difference is that the management procedures are different, and they belong to different management bodies for classification and hierarchical management.

Our standard samples are classified according to the characteristics of their fixed values, but also according to the application sector or field of the standard material, or according to the actual situation of its production, use and management of the standard material.

China's standard materials are divided into 13 categories: building materials, radionuclear materials, polymer materials, clinical chemistry, medicine, chemical industry, steel, geology, environment, food, energy, non-ferrous metals, engineering technology.

The above content is an introduction to the classification and status quo of standard samples. At present, there are many standard sample R & D and production units in China, and thousands of standard samples have been developed. The varieties include many kinds, such as non-ferrous metals, ores, steel, building materials, pesticides, environment, food, chemical products, engineering technology, physical characteristics and so on. Standard samples in various fields can be widely used, especially in recent years, it has been recognized by national laboratories, and has played an important role in quality system certification and national economic construction.