The evaluation of alpha- and beta-bitter acid contents of Czech and Moravian hops from the 2012 harvest
2013
Mikyska, A., Research Inst. of Brewing and Malting, Prague (Czech Republic) | Jurkova, M.
The concentrations of alpha- and beta-bitter acids from hops harvested in the Czech Republic in 2012 were evaluated in three areas, Zatec (77.8% of the hop yard areas in the Czech Republic), Ustek (10.8%) and Trsice (11.5%). The Saaz variety was cultivated on 87.2% of the harvest areas, the Sladek variety on 5.5%, Premiant variety on 5.2% and the Agnus variety on 1.2% of the harvest areas. The hops were analyzed in accordance with the Analytica-EBC, method 7.7 (HPLC). All results are given in weight % in dry matter. The average values for alpha-bitter acids in the Saaz variety in the Czech Republic was 4.12% (in the Zatec area 4.21%, in the Ustek area 4.04 % and in the Trsice area 3.84%), the level of beta-bitter acids was 4.75%. The average concentrations of alpha- and beta-bitter acids in the Sladek variety were 6.98% and 5.24%, respectively, in the Premiant variety 8.85% and 5.12%, respectively, in the Agnus variety 12.06% and 6.01%, respectively.
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