Simple polyphenolic compounds in beers of different origins
2010
Kellner, V.,Vyzkumny Ustav Pivovarsky a Sladarsky, Prague (Czech Republic). Pivovarsky Ustav | Cejka, P.,Vyzkumny Ustav Pivovarsky a Sladarsky, Prague (Czech Republic). Pivovarsky Ustav | Marinova, G.,IBHI Sofia (Bulgaria) | Bacvarov, V.,IBHI Sofia (Bulgaria) | Jurkova, M.,Vyzkumny Ustav Pivovarsky a Sladarsky, Prague (Czech Republic). Pivovarsky Ustav | Culik, J.,Vyzkumny Ustav Pivovarsky a Sladarsky, Prague (Czech Republic). Pivovarsky Ustav | Horak, T.,Vyzkumny Ustav Pivovarsky a Sladarsky, Prague (Czech Republic). Pivovarsky Ustav | Dvorak, J.,Vyzkumny Ustav Pivovarsky a Sladarsky, Prague (Czech Republic). Pivovarsky Ustav | Haskova, D.,Vyzkumny Ustav Pivovarsky a Sladarsky, Prague (Czech Republic). Pivovarsky Ustav
The aim of this study was to compare concentrations of simple polyphenolic compounds in beer of various origin: Czech, Bulgarian and other countries. In the first part of this study it was demonstrated that the composition of Bulgarian lager beers resembles more foreign lager beers than Czech lager beers as it was evident from colour, the lower attenuation difference, concentrations of bitter compounds and total polyphenols. Obviously the composition of Czech beer is unique. The following part of the study shows the concentrations of simple polyphenols. The level of simple polyphenols in beers varies considerably. Up to now no relationship such as to the degree of attenuation, the concentration of total polyphenols or the concentration of anthocyanogens was found. The probable explanation is that the concentration of these simple polyphenols is considerably influenced by the composition of raw materials, the brewing method and apparently also by the stabilization method. Furthermore, it was proven that the results of the determinations according to conventional group methods for total polyphenols, anthocyanogens and flavanoids are not, or only negligibly, influenced by the presence of simple polyphenols due to their low concentrations in beer.
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