The article is devoted to development of metrological support for measurements of mass fraction of crude fat (oil content) value which is hard to explain and generalised quality value of oilseeds and produced on their oilseeds residues, cereals and pulses, foodstuff and its components. Results of this value measurement depend on conditions of analysis and testing samples matrix. The problem of insuring of the results compossibility can be solved by the development of primary reference measurement procedure (PRMP) as well as development of related reference materials for transfer of the units to the results of routine measurements.

As the basic method was taken modified extractive method - Randall’s method of quantitative extraction of free and chemical or mechanical bound fat from product samples followed by measurement. Development of PRMP included the optimisation of the parameters of the measurement of the possible limits of their variation, as well as evaluating components of the uncertainty of measurement taking into account contributions related to influence on the measurement results of the applied equipment and reagents, equations, measurement, methodological factors, the heterogeneity of samples. The extended uncertainty of the measurement results of the mass fraction of crude fat (oil content) at the coverage coefficient k=2 was 0.15 %, providing a margin of accuracy of the developed PRMP concerning standardised measurement methods from 2.7 to 13.3 times.

Comparisons of measurement results of crude fat mass fraction (oil content) in the seeds of: sunflower, soy, rape plant, mustard, flax by PRMP and GOST 10857-64, GOST 32749-2014, GOST 8.597-2010 vindicated the absence of result biases according to PRMP in compare with the routine methods results. Developed PRMP for crude fat (oil content) mass fraction in oilseeds and other products on their base (FR.PR1.31.2019.00009) together with PRMP for mass fraction of ash in nutritive products and food ingredients (FR.PR1.31.2018.00002), and state standards for system of units GET 173-2017, GVET 176-1-2010 was used for characterisation of 14 types of reference materials such as GSO 11268-2019/ GSO 11270-2019; GSO 11279-2019/ GSO 11283-2019; GSO 11284-2019/ GSO 11289-2019.

The article presents the results of researches used as the basis of development of metrological assurance of measurement results of microbial transglutaminase content in samples of nutritive products complex that meets the requirements of the legislature in the field of assurance of measurement uniformity. The complex includes certificated measurement procedure that confirmed its applicability for samples of dairy and fish products according to the results of interlaboratory tests. The experience of preparation of homogeneous and stable samples of nutrition containing microbial transglutaminase and which will be used as a developing base of certified type reference material is described. The difficulties that were appeared during the carried out works by specialists from UNIIM- Affiliated Branch of the D. I. Mendeleyev Institute for Metrology and «XEMA» LLC at the time of solving the issue on application of the attested procedure of measurement when confirming the conformity ofproducts with the requirements of the Technical Regulations of the Customs Union TR TS029/2012.

The history of formation of the system of units of gas analytic measurements in the Russian Federation and the results of works carried out in 2015-2019 within the framework of improvement of the State primary standard of units of molar fraction, mass fraction and mass concentration of components in gas and gas condensate environs GET 154-2016 are presented. The new equipment included in the GET 154-2016 based on the results of the work and the composition of the newly approved GET 154-2019 are described. Information on international key comparisons is given.

The main purposes of education and training of metrological experts based on brief review of key development stages of metrological education system were underlined. The alternate version of integration of science and education, when learning activities are realising at state scientific metrological centres was suggested. There was showed that the creation of metrological cluster for providing the education is effectually. Such clusters should consist of universities, scientific metrological institutes as well as high-schools. For the realisation of uniformity of preparation and training of potential experts on the all stages of «educational stairs» was suggested the way based on development of united teaching and learning materials on methodological support.

The issues of the functioning of the BIPM and the corresponding committee - CCQM, coordinating the work on the comparisons of national standards in the field of organic analysis have considered in this article. The structure and tasks of the CCQM have described and the measurement categories for the amount of substance have given. The main aspects of the OAWG activities have discussed and the issues of systematization and separation of comparisons in the field of organic analysis have discussed in detail and various approaches to the development of competence areas based on key comparisons have set out. The fundamental importance of pure organic substances in providing metrological traceability in organic analysis has highlighted. The key role of the State Primary Standard GET 208 in terms of confirming the equivalence of the calibration and measurement ccapabilities (CMC) of Russia at the international level has been determined.