How about Jinan chemical reagent? Beijing Boyi Huike Biotechnology Co., Ltd. insists on customer-centered, fast Su response to customer needs, and continuously create long-term value for customers and become customers. Establish confidence information. The characteristic values of certified reference materials should be traceable to relevant SI basic units, other recognized certified reference materials or well-recognized standard methods through an uninterrupted calibration chain. In any case, the principle and procedure for obtaining the characteristic (quantity) value (and its uncertainty) of certified reference materials (CRMs) should be elaborated in the traceability instructions of certified reference materials certificates. Following is the information (if applicable) required in the Certificate of Standard Substances-Certificates and Labels (Standard Substances-Certificates and Labels) of Guidelines 31 (2000 edition) developed by the Standard Organization for Standardization (IsO) Committee on Standard Substances (REMCO): the name and di address of the certifying authority; the title of the document.
Jinan Chemical Reagent Reference Material (RM): A substance or material that has identified one or more sufficiently uniform characteristic values as a "measuring tool" in the analysis and measurement industry. It calibrates measuring instruments and devices, evaluates measuring and analytical methods, evaluates the characteristic values of measuring substances or materials, and evaluates the operating skills of analysts, as well as in the production process. The quality control of Chinese products plays an indispensable role. For example: standard reference materials for agricultural product quality testing, reference materials for Yao quality control and so on. 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.
ISO/REMCO divides standard materials into 17 categories: geology, nuclear materials, radioactive materials, non-ferrous metals, plastics, rubber, plastic products, biology, plants, food, clinical chemistry, petroleum, organic chemical products, physics and metrology, physical chemistry, environment, ferrous metals, glass, ceramics, biomedicine, yao, paper, inorganic chemistry. Products, technology and engineering. According to this method, China also classifies reference materials into thirteen categories: standard materials for steel component analysis, reference materials for gas component analysis in non-ferrous metals and metals, reference materials for building materials component analysis, and reference materials for material component analysis and radioactivity measurement. These methods have high accuracy, but their systematic errors are very low or even close to zero. Therefore, they can be used in limited uncertainties. The value of measurement parameters in the range of degree. For example, isotope dilution mass spectrometry can overcome many problems in the determination of trace elements in precise que. It can compare the number ratios of isotope atoms of different masses without requiring quantitative separation of samples. In theory, the results are directly traced back to the basic unit mole. The sample is labeled with an isotope labeled element or a chemical he, and then the isotope is homogenized so that the proportion of the analyte in the sample can be determined by mass spectrometry without any matrix action.
The certificate of reference material pH should indicate the certified value of the reference material, the uncertainty of the certified value, the correct use method, the matters needing attention in transportation and storage, etc. The preparation and content of the certificate shall meet the requirements of the technical document issued by ISO/REMCO (IS0 Guideline 31:1981) and the relevant rules for certificate preparation issued by the competent national metrology authorities. The batch production of certified reference materials must have sufficient batch and reserve to meet the actual needs of the measurement work for certified reference materials. Especially the second-level (i.e. working-level) reference materials, which are directly used for field analysis and measurement, are in great demand.