Determination of CO_2 in Packaged Beer by a Manual Pressure/Temperature (P/T) Method - Determination of the Repeatability and Reproducibility

摘要

The determination of CO_2 in packaged beer by a manual pressure/temperature (P/T) method was collaboratively tested by the Analysis Committee of the European Brewery Convention according to ISO Standard 5725 in order to determine its suitability for publication in Analytica-EBC. Repeatability (r_(95)) and re-producibility (R_(95)) values are presented. Repeatability (r_(95)) was found to be independent on the mean value and was 0,12 g/l over the range 4,8 to 7,0 g/l. Reproducibility (R_(95)) was found to be dependent on the mean and was 0,089m g/l over the range of CO_2 tested, The method has acceptable repeatability and reproducibility and is recommended for inclusion in Analytica-EBC. At the same time an instrumental thermal conductivity method using the Micro Logger 3654 analyzer from Hach Ultra Analytics was also collaboratively tested in order to determine its repeatability (r_(95)) and reproducibilitv (R_(95)) values.