Application of Coriolis Flow Controllers for the Development of a Reference Gas Mixing Installation to Improve the Metrological Support of Gas Analysis Measurements

The metrological support for gas analysis measurements of component content in gas media is facing increasing accuracy requirements as analytical instrumentation advances. Modern demands on analytical instrumentation involve expanding measurement ranges, reducing errors, and enabling the analysis of complex sample matrices. However, not all existing gas mixture generators meet these requirements. The aim of the research described in the article is to evaluate the capabilities of Coriolis flow controllers for creating a reference dynamic installation capable of reproducing and disseminating the unit of molar fraction of components in gas media with high accuracy.The starting point of the research was an analysis of published results on the preparation of gas mixtures by static and dynamic methods. The analysis identified the strengths and weaknesses of both approaches. An experiment on the preparation of gas mixtures using Coriolis flow controllers was subsequently conducted. It was concluded that Coriolis flow controllers offer significant advantages, primarily their independence from the physicochemical properties of the gas and their high flow measurement accuracy. The main metrological and technical characteristics of the Coriolis controllers were presented. The study demonstrated the feasibility of their application in reference dynamic installation for the preparation of binary and multicomponent gas mixtures.The study demonstrated the feasibility of using Coriolis flow controllers to create a reference dynamic installation capable of reproducing and disseminating the unit of molar fraction of components in gas media with high accuracy. Furthermore, the results of this work can be used to enhance the metrological support for gas analysis measurements and improve the reliability of analytical results.