Use of Reference Materials-Imitators for Metrological Support of Gas Analytical Measuring Instruments

Measurements in the field of gas analysis are one of the types of measurements of the physical and chemical composition and properties of substances, and cover a large amount of measurement tasks in various areas of human activity. The main means of calibration and verification of gas measuring instruments are 1st and 2nd category reference materials: gas mixtures, permeation tubes of gases and vapors, gas generators. The purpose of the research was to summarize the many years of experience of the specialists of the Research Department of State Standards in the field of Physical and Chemical Measurements, D.I. Mendeleyev Institute for Metrology, in terms of the use of reference materials—imitators for metrological support of the measuring instruments. The research considered the main features of the use of reference materials of gas mixtures as imitators of real environments. The main differences between imitators with a real environment were described. Approaches have been developed to assess the possibility of using imitators, the features of testing, calibration and verification of the measuring instruments. The practical significance is the use of the research results by metrologists in solving practical problems that arise during tests, verification and calibration of the measuring instruments.