Kvasny Prumysl, 1999 (vol. 45), issue 6
The new method of objective providing of beer tests with ammonium sulfate in standard chemical test tubes.Peer-reviewed article
P. SLADKÝ, H. CÍSAŘOVÁ
Kvasny Prum. 1999; 45(6): 156-159 | DOI: 10.18832/kp1999011 
The new method of projective determination of precipitation threshold of beer colloids with saturated solution of ammonium sulfate is described. It is based on intensity measurement of nephelometric turbidity of sample in standard chemical test tubes in dependence on titrator quantity dosed step by step and stirred by standard micropipette provided with piston agitator. For evaluation of test there is introduced a precise analytical definition of precipitation threshold of beer with ammonium sulfate, respectively other titrators, based on tangential determination of threshold concentration necessary for colloid precipitation of sample.The described...
Polychlorinated biphenyls and polycyclic aromatic hydrocarbons in beer.Peer-reviewed article
T. HORÁK, M. JURKOVÁ, J. ČULÍK, V. KELLNER
Kvasny Prum. 1999; 45(6): 159-161 | DOI: 10.18832/kp1999012
Polychlorinated biphenyls and polycyclic aromatic hydrocarbons rank among significant contaminants of environment. While PCB have arisen by target industrial production, PAH abundance is, besides natural sources, given by imperfect combustion of mass. The consequence of considerable extention of these substances is their penetration into food chain. It is about very harmful to health substances which are characterized carcinogenic and immunotoxic effects in particular. From these reasons legislative regulations of the Czech republic, whose survey is included in this work, determine PCB and PAH maximal concentrations in individual types of waters and...