Publication detail

Determination of Bitter Acids in Various Hop Species and Evaluation of their Contents in Beer Prepared by So-Called Dry Hoping

Authors: Adámková Karolína | Adam Martin | Poreda Aleksander | Jonas Trummer | Monika Cioch

Year: 2017

Type of publication: ostatní - článek ve sborníku

Name of source: YISAC 2017 24th Young Investigators Seminar on Analytical Chemistry : book of abstracts

Publisher name: Ca’ Foscari University of Venice

Place: Benátky

Page from-to: 21

Titles:

Language	Name	Abstract	Keywords
eng	Determination of Bitter Acids in Various Hop Species and Evaluation of their Contents in Beer Prepared by So-Called Dry Hoping	The aim of this work was to determine the content of α- and β-bitter acids commonly found in hops. A total of 7 different hop varieties were analysed. The results were compared with the data provided by the distributor. Determination of bitter acids was performed by HPLC method with UV-VIS detection at 314 nm after extraction of hop pellets according to the standardized EBC method (7.7), which used ICE-3 (International Calibration Extract 3) as a hop extract containing a specified concentration of α- and β-acids. Finally, there were analysed some real samples of beers brewed using so-called dry hoping process. Extracts from beers were prepared by the same way as extracts from hop pellets. Obtained results were evaluated and there were investigated if it is possible to determine the content of bitter acids (assumed before isomerisation) after dry hoping. Beer samples were also brewed by our own technology at the university brewery where the Perle hop was used for dry hoping.	Bitter Acids; HPLC; Dry Hoping

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