The standard material is a tool and means for the transfer of quantity value, and the standard sample is a national physical standard developed to ensure the implementation of national standards or industry standards. So what are the differences between a standard substance and a standard sample? Next, Bolinda Xiaobian to introduce it to you.

The difference between standard material and standard sample:

1. Differences in management bodies

The standard substances and standard samples are approved by the Standards Department of the International Technical Supervision Bureau and issued by the State Technical Supervision Bureau, but the standard substances are organized and reviewed by the national Standard Substances Management Committee, while the standard samples are organized and reviewed by the national Standard samples Technical Committee.

2. Different code names

The code name of the standard material is GBW, and the code name of the standard sample is GSB.

3. Different definitions

A reference substance is a substance or material that has one or more sufficiently homogeneous and whose characteristic magnitude values have been well determined. Used to calibrate instruments, evaluate measurement methods or determine the quantity value of materials;

A standard sample is a batch of samples that have one or more chemical, physical, biological, engineering or sensory performance characteristics that are sufficiently uniform, have been certified by technology, and are accompanied by certificates of relevant performance data.

4, the difference between the preparation process

The preparation of standard samples should go through the steps of preparing materials, inspecting the finished materials for uniformity, setting values, stability, packaging, review, approval and release.

The preparation process of the standard material is basically the same as that of the standard sample, but the requirements are much higher.

5. Different uses

Standard samples are developed for the needs of the implementation and formulation of standards, generally only in the scope of the standard involved in the use of it in the physical standard (relative to the text standard) can not be used as measurement transfer;

The standard material is a measurement standard, can be used as a measurement transfer, used to calibrate the instrument, evaluate the measurement method, determine the quantity value of the material, as long as it is suitable to replace the standard sample in the formulation and implementation of standards.

The above content is the introduction of the difference between standard substances and standard samples, in the international standard substances and standard samples of the English name are "Reference Materials", by ISO/REMCO organization responsible for this work. In China's metrology system, "Reference Materials" are referred to as "standard substances", which mostly refer to the standard substances used for bioassay, antibiotic or biological drug content or titer determination, and are mostly expressed in titer unit (U). In drug testing, it is a control to determine the authenticity of drugs, is an essential tool to control the quality of drugs.