The State Primary Measurement Standard for units of specific gas adsorption, specific surface area, specific volume and pore size of solid substances and materials (GET 210–2014) is currently in operation at UNIIM. The GET 210-2014 has calibration and measurement capabilities for pore size in a range from 2 to 100 nm, while in practice there is a need to control the pore size of solid substances and materials in a range from 100 to 10,000 nm. In order to enhance the calibration and measurement capabilities of the GET 210-2014, it was proposed to include two reference systems implementing the methods of mercury porometry and stationary filtration into the measurement standard. This work considers the state of the metrology of porometry and presents the first results of studies on the metrological characteristics of reference systems implementing the methods of mercury porometry and stationary filtration. Algorithms for calculating the uncertainty of quantities being reproduced via the methods of mercury porometry and stationary filtration and characterizing the porosity of solids have been developed and tested. The reliability of the developed algorithms is confirmed by: the results of participation in 4 international comparisons, the measurements of foreign-made reference materials, along with the results of participation in 6 rounds of interlaboratory comparisons. The measurement standard improvement will provide metrological support to measuring instruments and measurement procedures for sorption properties, porosity and gas permeability of solid substances and materials in various industrial sectors. Thus, the metrological independence of the Russian Federation will be ensured and import substitution of expensive foreign reference materials carried out.

Introduction. The article considers the problems of metrological support of catalytic activity measurements. The paper gives certain characteristics of the State Primary Special Measurement Standard for the unit of catalytic activity – KATAL and examines the role of reference materials (RMs) in ensuring the metrological traceability of measurement results.

Materials and methods. A method for measuring the concentration of the recombinant protective antigen of Bacillus anthracis and the recombinant GP-protein of the Ebola virus, which means in using «sandwich» enzyme-linked immunosorbent assay, was certified by FGUP «VNIIMS» as a measurement procedure. The following RMs tested by FGUP «VNIIMS» can be used for the development and production of appropriate control samples when performing measurements for comparisons: the RM for the mass concentration of the recombinant protective antigen of Bacillus anthracis in phosphate-saline solution, the RM for the mass concentration of the recombinant GP-protein of the Ebola virus, and the RM for the mass concentration of recombinant Clostridium Difficile toxin.

Results. The paper presents the main reactions of the method for measuring the catalytic activity of catalysts for heterogeneous processes, which are also used to carry out exhaust gas cleaning processes.

Discussion and conclusions. Thus, conditions have been created for building hierarchies of calibrations of in-demand objects established on the basis of the List of Critical Technologies of the Russian Federation, state programs for the development of industrial sectors.

Introduction. The article presents results of developing a certified reference material for the physical properties of the soil clay (loam). The certified characteristics of the reference material are as follows: moisture content at the liquid limit via fall-cone test, moisture content at the plastic limit, soil particle density via pycnometer method.

Materials and methods. The certified values of the physical properties of the soil clay (loam) were determined using the method of interlaboratory metrological experiment.

Results. The bounds of absolute error of the certified values are as follows: 1.9 % for moisture content at the liquid limit via the fall-cone test, 1.5 % for moisture content at the plastic limit, 0.03 g/cm³ for soil particle density. The validity period of the certified reference material is 5 years.

Discussion and conclusion. The developed reference material was registered in the State Register of type-approved reference materials as GSO 11038–2018. The reference material is aimed at: controlling the accuracy of the measurement results of certified characteristics; conducting interlaboratory comparisons; testing laboratories proficiency.

The first part of the article presents the history of creating quantitative NMR analyzers of oil content and humidity of oil crop seeds and their by-products. The developed NMR analyzers differ from similar devices in the availability of metrological support (reference materials (RMs) of approved type) and an extended range of moisture measurement (5–20)%. The main metrological characteristics of the developed NMR analyzer are given. The second part of the article deals with problems solved in the process of carrying out the scientific research work on the development of metrological support for quantitative NMR analyzers. Based on the tasks set, the most optimal substances imitating oil and water components contained in the oil crops and their by-products were selected. The imitation substances in question provide long-term stability of the developed RMs, erewhile being chemically inert to each other, environmentally safe? and allowing an imitation of oil and water in oil crops and their by-products. Organosilicon fluids with (35–40) ms and (95–130) spin-spin relaxation times of protons ms are proposed as an oil imitator. To imitate water, a one-component self-vulcanizing organosilicon compound, which is applied to paper strips with a thin coat, is used in the developed type-approved RMs. In conclusion, the article presents perspective directions of developing RMs of mass fraction imitators of typical fatty acids in the oil of oil crops (sunflower, linseed, and rapeseed).

This paper considers the participation of FSUE «VNIIFTRI» in international comparisons: in the field of physicalchemical measurements, particularly in pH-metry and ionometry (pX); in the sphere of measuring inorganic components in various matrices. Measurement and calibration capabilities are presented – CMC lines in the BIPM database.