Dissemination of units of mole fraction and mass concentration of gas components by means of first-grade working standards based on dynamic gas mixture generators |
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| Authors: | A?V?Malginov A?A?Evdokimov Email author" target="_blank">E?V?GromovaEmail author |
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| Affiliation: | (1) Mendeleev All-Russia Research Institute of Metrology, St. Petersburg, Russia; |
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| Abstract: | A comparison of static and dynamic methods of preparing gas mixtures is presented and requirements that working standards
based on dynamic generators must satisfy are formulated. The basic sources of errors in the reproduction of mole fraction
and mass concentration of components in gas mixtures are analyzed by a dynamic method and results from a study of methods
of increasing the stability and precision of dynamic generators are presented. A new complex of first-grade working standards
is described. Data of an experimental study of the metrological characteristics of dynamic generators based on the results
gained from their use in international key comparisons are presented. |
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