Metrological Traceability of Coomet Reference Materials. Part. 1. International Practice in Establishing Traceability of Reference Material Certified Values

Many countries are currently focused on expanding the range of national means for measurement unit transfer characterized by established metrological traceability within international organizations. As well as demonstrating the high level of measurement capabilities provided by organizations and countries, such activities facilitate a solution to the global problem of ensuring the comparability of measurement results obtained for different objects at various times in diverse parts of the world. The present article highlights issues involved in establishing the metrological traceability of physicochemical measurement results. Curent international practice in establishing traceability of reference material certified values is described. In addition, the authors provide a brief overview of internationally recognized concepts related to the metrological traceability of reference materials.