化学分析实验室标准物质的使用和管理（Use and management of certified reference materials in chemical analysis laboratories）.docVIP

化学分析实验室标准物质的使用和管理（Use and management of certified reference materials in chemical analysis laboratories） Abstract: the problems existing in the use and management of certified reference materials in chemical analysis laboratory are analyzed. The correct use and management of standard materials and the accuracy of analytical results are discussed. Keywords: chemical analysis; standard materials; use; management O introduction Standard sample (RM) is sufficiently homogeneous material or substance has been well identified one or more characteristic values of certified reference materials (CRM) is the standard sample with the certificate, the one or more characteristic values with established traceability procedures identified, which can be traced to the accurate realization the unit of measurement of the characteristic value for representation, and each standard value are attached to the uncertainty of the confidence level of the. The assignment in chemical analysis laboratory standard samples are widely used in the calibration of instruments, evaluation of test methods or materials, standard material for proper usage and management to ensure the accuracy of the analysis results, traceability is important. 1 kinds of standard materials 1.1 classification of certified reference materials The standard materials used in chemical analysis laboratories are standard materials, primary and two grade reference materials, etc.. Reference material is a kind of chemical pure substance, which can be directly traced to the national standard through reference device and basic method. It is used for tracing and reproducing the value of chemical composition. The accuracy of primary standard material (GBW) has the highest level in China. It is mainly used to evaluate standard methods and to make arbitration analysis standards. It is the standard value of two standard materials and the basis of value delivery. Two standard substance GBW (E), a method of comparing measurements with a sta