Kvasny Prumysl, 2009 (vol. 55), issue 3
Application of some modern sample preparation procedures for quantitative determination of vicinal diketones in beer.Peer-reviewed article
Tomáš HORÁK, Jiří ČULÍK, Marie JURKOVÁ, Pavel ČEJKA, Vladimír KELLNER
Kvasny Prum. 2009; 55(3): 66-72 | DOI: 10.18832/kp2009007 
The measurement of the content of the vicinal diketones in beer is important because these compounds, especially diacetyl, give beer a buttery off-flavour in concentrations above the flavour threshold. This work is focused on evaluation and optimization of stir bar sorptive extraction (SBSE) the modern sample preparation procedure for the determination of vicinal diketones in beer.Validated parameters of this optimised method were compared with parameters of solid phase microextraction (SPME). The selective determination of diacetyl and pentandione was performed by gas capillary chromatography with electron capture detection.The measurement of the...
Barley storage system and its impact on malt and beer quality.Peer-reviewed article
Alexandr MIKYŠKA, Josef PROKEŠ
Kvasny Prum. 2009; 55(3): 73-81 | DOI: 10.18832/kp2009008
An influence of barley storage on malt quality was tested in a laboratory scale. After dormancy had come to end barleys of varieties Jersey and Tolar were stored at amount of 50 kg at the temperature was 10 °C in aerobic and anaerobic conditions. Malting was carried out in a laboratory malting plant in three times, 2 weeks, two months and six months after the start of storage trial. After 3 weeks of malt storage brewing trials carried out. Complex evaluation of all determined analytical malt quality parameters by cluster analysis confirmed significant dependence of malt quality on properties of barley variety, and shows significant dependence of malt...