GET 210-2019: STATE PRIMARY STANDARD OF UNITS OF SPECIFIC ADSORPTION OF GASES, SPECIFIC SURFACE AREA OF PORES, SPECIFIC VOLUME OF PORES, DIMENSION OF PORES, OPEN POROSITY, AND COEFFICIENT OF GAS PERMEABILITY OF SOLID SUBSTANCES AND FABRICATED MATERIALS

摘要

Methods and means of measurement of the characteristics of the porosity and permeability of solid substances and fabricated materials that are incorporated into GET 210-2019, the State Primary Standard of the units of specific adsorption of gases, specific surface area, specific volume, and dimension of pores, open porosity, and coefficient of gas permeability of solid substances and fabricated materials, are described. A comparison between the metrological characteristics of GET 210-2014 and GET 210-2019 is carried out. The basic means of transmission of the units of quantities that characterize the porosity and permeability of solid substances, such as calibration specimens of approved types based on the micro, meso-, and macroporosity of solid substances, are considered. The results of international comparisons are presented, measurement and calibration capacities are confirmed, and a comparison of the metrological characteristics of GET 210-2019 with the standards of other countries is performed.