The storage of the standard material should ensure the storage of environmental conditions, when the standard material storage is lost, it may cause its denaturation, decomposition, failure, if such a standard material is used, it will seriously affect the quality of the experimental results.

At the same time, the location, method and order of storage should also be set according to the use habits of the laboratory, otherwise it is not only a waste of time to reduce work efficiency when you need to use it, but also may occur due to the adverse consequences of placement confusion and misuse.

The first step after the procurement of standard materials into the laboratory, we need to do targeted acceptance. Some common confirmation work during acceptance are:

1, check whether the standard material packaging is intact.

2. Check whether the CAS number matches the standard material expected to be purchased.

3. Check whether the standard material matches the certificate contained in the box.

4. Check whether the certificate information is correct.

5. Check whether the validity period of the standard material is normal.

6. Check whether the container contains the required substance.

7. Check whether the material properties in the container have changed.

8, clear there are no special storage conditions requirements.

The above content is an introduction to the common problems of the use of standard substances in the National Center for standard substances. The preservation conditions of standard substances are determined in the stability study, while the conditions of use of standard substances are strictly determined and complied with in the setting process of standard substances. Failure to use and preserve in accordance with the provisions will lead to the quantity value of standard substances is no longer effective. The measurement results are different from the standard values.