Abstract
Breath alcohol analyzers are instruments for the determination of alcohol (ethanol) mass concentration in exhaled air. These instruments are calibrated in Poland using wet gas standards produced in situ from aqueous standard solutions in breath simulators. The value of the mass fraction of ethanol in solution is necessary to determine the concentration of ethanol in the produced gas standard. New reference materials of ethanol in an aqueous solution intended for use in breath simulators for calibration and testing of breath alcohol analyzers were described. They were certified following standard ISO 17034:2015 and Guide ISO 35:2017 ensuring traceability of certified values.


