Kunming Standard Sales, Sudan Red Solution Standard Material Beijing Boyi Huike Biotechnology Co., Ltd. to serve customers as the criterion, to achieve customers, is to achieve us. However, in fact, for chemical composition measurement, most of the benchmark measurement methods rely on a certain measurement standard, and they can be used in relatively few occasions. In addition, they are quite time-consuming and costly. Therefore, the application range of the benchmark measurement method is limited to a certain extent. However, if these measurements are implemented correctly, a high quality measurement result can be obtained. Generally speaking, in the development of reference materials, if feasible, the gravimetric method should be preferred for the determination of chemical composition, but unfortunately this situation is not common.
Kunming Standard and Certified Reference Materials (CRMS) is only a concept of "subordinate" (just a member of the family). Other examples with subordinate concepts are working reference materials (WRMS), calibration materials (CALS), or reference reference reference materials (PRMs). This hierarchy is not a judgment of value, but merely a terminological hierarchy. "Certified" and "benchmark" are determinants that indicate a special group of reference materials (RM). Therefore, all certified reference materials (CMRs) are certified reference materials (RMS), but not all certified reference materials (CRMS). Certificates should provide users with the necessary information to enable users to have a clear understanding of the reference material. All national (certified) certified reference materials approved and issued by the national metrological administrative department shall be certified by the certifying body and provided to users together with the certified reference materials. Certificate consists of cover, body and appendix. In order to ensure the authenticity and validity of certificate, anti-counterfeiting design should be adopted when necessary. The expression requirements of certificates and labels: literal expression should be precise, precise, concise and clear, without ambiguity; terminology, symbols, codes and so on should be unified, and the same concept should always be expressed.
If the participating laboratories essentially use the same measurement method to establish the characteristic value, then the cooperative comparison research fixed value becomes a fixed value method of the specified measurement method. In this case, the obtained characteristic value depends on the method, which must be explained in the corresponding certificate of reference materials. In many areas, comparisons and cooperation between laboratories are the only effective way to determine the value, especially in some areas of compulsory control, such as the content of toxic metals dissolved in paint, flash point of flammable solvents, etc. Many certified reference materials used in clinical chemistry are determined by reference method. Name of substance; Code and batch number of reference material; Description of substance; Use of reference material; Guidance for correct use of reference material; Information on safety; Level of uniformity; Value of identification and uncertainty; Traceability; Value from independent laboratory or method; Measurement uncertainty; Validation date; Stability information; Other information; Legal information; Signature or name of identification personnel 。 The competent national metrology authorities also put forward specific requirements for certification and compilation of certified reference materials in relevant technical regulations. Among them: Part 1: The general requirement for certificate preparation is that certification bodies (or production units) provide users with technical documents for introducing the characteristics of reference materials.
Standard substances of Sudan Red solution collect fruit leaves, simulate the matrix of plants in biochemical and environmental analysis; synthesize glass containing trace elements as the matrix of mineral components; simulate sea water, River water, acid rain as the matrix of water quality standard substances, etc. These methods are all to eliminate the influence of matrix differences when using standard substances for measurement. For many years, there has been a heated debate on the hierarchy of certified reference materials and certified reference materials in the field of measurement. The controversy stems from the names of various reference materials. At the terminological level, the reference material (RM) has a "higher" status because it has a higher concept (family name).
