The capability for the preparation of certified reference materials of carbon monoxide, carbon dioxide, and propane in nitrogen will be compared. The participating national metrological institutes submit each a gravimetrically prepared gas mixture of a specified target composition typical for the automotive industry to the coordinating laboratory. All mixtures will be analysed by the coordinating laboratory using a gas chromatograph equipped with a thermal conductivity detector in three runs under repeatability conditions. Based on the calibration curve, reference values will be assigned to the amount fractions of carbon monoxide, carbon dioxide, and propane. The degrees-of-equivalence will be established as difference between the gas composition as calculated from preparation and the measured one, and its associated uncertainty.
Final Report 2016-01-07
The comparison has been completed and results are published in theKCDB.