Kvasny Prum. 1972; 18(7): 150-154 | DOI: 10.18832/kp1972012

Comparison of two methods for the determination of CO₂ content in beer.Peer-reviewed article

A. PRÍBELA, K. TOMÁŠEK

The authors have elaborated and applied two methods for the determination of CO₂ in beer, viz. a modified titration method and a manometric one. Both methods were used to analyse the samples of 7°, 10° and 12° bright beer. Mathematic statistics is used to find the limits of  variations  of the results obtained by CO₂ analyses of a set of beer samples. The coefficients of variation calculated from the results of titration and manometric methods do not exceed ± 5%. The CO₂ content of the beer can be determined either from equations, or from diagrams. The authors have worked out a diagram covering pressures from 0.4 to 3.0 atm and temperatures from 5 to 30°Cand, consequently, the CO₂ concentrations from 0.2 to 1.0 of CO₂  in 100 ml of beer. The diagram saves time and is very convenient. The article deals also with the application of manometric method for routine analyses in breweries. For correct results it is necessary to take into account the effects of air present in the branch. Statistical analysis confirms correlation between the two methods. The coefficient of correlation r = 0.89 and the difference between  the methods is therefore within the limits of random errors.
(In Slovak, English summary only)

Keywords: beer, carbon dioxide, determination

Published: July 1, 1972