Al’manac of Modern Metrology, № 2 (46) 2026, pages 8–21

Results of international comparisons conducted within the framework of the Consultative Committee on Amount of Substance with the participation of the State Primary Standard GET 217-2018

Author(s): Alexey A. Stakheev, Tatiana P. Sheremet

Abstract

This review article describes the participation of the State Primary Standard of Unit of Mass Fraction and Unit of Mass (Molar) Concentration of Inorganic Components in Aqueous Soluions Based on Gravimetric and Spectral Methods GET 217 in international key comparisons: SIM.QM‑S7 “Trace Metals in Drinking Water”; CCQM‑K128 “Measurement of Heavy Metals and Organo‑Tin in Leather Powder”; APMP.QM‑S10 “Elements in Food Supplement”; EURAMET.QM‑S11 “Determination of Elements in River Water”. The aim of this participation was to demonstrate the standard’s measurement capabilities and ensure international comparability of measurements results of the content of elements in various matrices. The methods used included gravimetric standard additions (with mass spectrometry and optical emission spectroscopy) and isotope dilution mass spectrometry. Results confirm that GET 217 measurements for various matrices (drinking water, river water, leather powder, food supplements) are comparable to those of other national metrological institutions and designated institutes.

Keywords

state primary standard, GET 217, method of measurements, aqueous solution, international comparison

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For citation

Stakheev A.A., Sheremet T.P. Results of international comparisons conducted within the framework of the Сonsultative Сommittee on Amount of Substance with the participation of the State Primary Standard GET 217-2018. Almanac of Modern Metrology. 2026; 46 (2): 8–21.

Financing

International comparisons were carried out within the framework of an agreement on grant provision for “Conducting comparisons of national primary measurement standards of units of quantities with the standards of the International Bureau of Weights and Measures and the national standards of units of quantities of foreign states”.

Contribution of the authors

T.P. Sheremet: experiment execution and data acquisition, methodology development for preparation and measurement, literature review. A.A. Stakheev: conceptualization of the study, defining the manuscript’s scope, text analysis and refinement.

Conflict of interest

This article is based on a presentation at the VII International Scientific Conference “Reference Materials in Measurements and Technologies”, Yaroslavl, Russia, 2–5 September 2025. It was accepted for publication after revision of the abstract, manuscript formatting, and peer review.