The standard material is relatively practical and can be applied well under actual working conditions, so it can be used for calibration and verification of me...

Reference material occupies a very important position, and reference material has two main characteristics, such as uniformity and stability, among which refer...

Due to the different physical properties, chemical properties and biological characteristics of the standard material itself, coupled with the purpose, require...

A reference substance is a substance or material that has been determined to have one or more sufficiently uniform characteristic values, and is used as a "mea...

Standard products refer to the standard substances used in the national drug standards for identification, inspection, content determination, impurity and rela...

National drug standards and reference strains refer to the standard substances used in the national drug standards for identification, inspection, content dete...

Standard solution refers to a reagent solution with an accurate known concentration, and titrators are commonly used in titration analysis. In other analytica...

Standard product is a measure of the Chinese medicine standard reference product research center agent, used as a drug, it is the standard content in the cont...

The national standard material has a wide range of applications in our chemical field and biological field, and it is a special instrument for measurement. In...