The standard material is the core and basic part of the technical foundation, and is an important guarantee of the quality of the analytical measurement results. And how to do a good job in the use of standard material quantity control is often a problem that users are confused about, the following small edition of Bolinda to introduce you.

Specific measures for the quantity control of standard substances shall be formulated under the following circumstances:

1. For certified standard substances, as long as they are stored in accordance with the conditions and methods specified in the certificate of standard substances and used within the validity period, the quantity value is guaranteed, and the verification of such standard substances can be simplified to check the integrity of packaging, labels and certificates, validity period, preservation conditions, etc.

If it is a certified reference material that can be used several times after opening, in addition to the above verification, the laboratory shall formulate corresponding documents to regulate its subsequent use and management, check its use regularly, and conduct quantitative verification by comparing with another unopened unit or batch of reference material when necessary.

2, for the internal standard substances or laboratory calibration solutions prepared by certified standard substances, due to the lack of sufficient uniformity and stability data, strict quantitative control is very necessary, the way can be flexibly grasped depending on the economic and technical conditions of the laboratory.

Such as the use of quality control charts to check the trend, through the comparison of the quantity value of the next batch of standard substances or the comparison between laboratories to verify the accuracy of the quantity value, etc. : In addition, the frequency of verification should be formulated according to the characteristics of the standard material, and the standard material with good stability expectation can relatively relax the verification interval.

The above content is how to do a good job in the use of the standard material quantity control, some standard substances may only apply to a specific method or exclusive field of application, the value of some standard substances have special provisions, such as the value of crystal water, should be noted in the certificate to prevent misselection and misuse.