Kvasny Prum. 1978; 24(2): 30-32 | DOI: 10.18832/kp1978005

Furfural as an indicator of the age and storage period of beer.Peer-reviewed article

J. ŠAVEL, D. ZDVIHALOVÁ

The article deals with the kinetics of the furfural formation during the storage period of pasteurized beer. In the 0 - 300 µg/l range of furfural concentration and 20 -37 °Crange of temperatures the formation obeys the kinetics of zero order and the process is described by equation C = A . t exp (- E/RT) where c = furfural concentration in time t,R - gas constant, T - temperature [°K], E = 1.018 . 10⁵ J mol^{-1, A = 1.561 . 1018} µg . l^-1 . day^-1. To express the influence of storage temperature and age of beer a special "furfural unit" has been introduced. It is the amount of furfural produced in 24 hours at 20 °C. The relative rate of furfural formation expressed in FU . day^-1 is described by the following equation L = exp [E/R (1/293.15 - 1/T)]. From the data of beer analysis the number of FU can be calculated as follows FU = µg/l of furfural/1.133.
(In Czech, English summary only)

Keywords: beer, furfural, indicator, age period, storage period

Published: February 1, 1978