Р.V. Migal, E.P. Sobina, T.N. Tabachnikova

Al’manac of Modern Metrology № 2 (14) 2018, pages 81–86

The paper presents the results of the development of transfer standard as a high-purity sub-stance, including from the standpoint of comparing approaches to assessing the purity or mass fraction of the main substance indirectly and directly. An analysis of the characterization uncertainty sources of these standards by impurity composition (indirect method) is carried out. The basic requirements for the starting material of the transfer standard and the requirements for measurement methods are determined depending on the target uncertainty of the mass fraction.
The results of international works in related fields are shown. They confirm the relevance of the studies and confirm the appropriateness of the selected algorithms and approaches.
A schematic diagram of metrological traceability in quantitative chemical analysis with the use of developed standards is proposed.

Key words: transfer standard, metrological traceability, chemical analysis.

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