Authors Piotr Janko, Robert Kordulasiński, Jolanta Wasilewska, Elżbieta Lenard Central Office of Measures (Główny Urząd Miar)
Breath analyzers are instruments for determination of alcohol (ethanol) mass concentration in exhaled air. These instruments are calibrated in Poland by means of wet gas standards produced „in situ” from aqueous standard solutions in breath simulators. The paper presents a procedure developed at GUM for the gravimetric preparation of liquid ethanol standards along with a detailed analysis of the potential sources of uncertainty of assigned ethanol content.
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