Kvasny Prumysl, 2000 (vol. 46), issue 2
Rapid measuring of kieselguhr permeability and filterability.Peer-reviewed article
J. ŠAVEL
Kvasny Prum. 2000; 46(2): 39-41 | DOI: 10.18832/kp2000003 
Experience from a new laboratory filter for measuring permeability and filtration rate of powdered filter aids is described. It is possible to measure flow rate across precoating layer of filter aid, even during coating. Beer filterability can be expressed by blocking value as well as so called filtration cake value by the Raible method. New rapid method uses precoating of the complex of beer, desposits and filtration material and subsequent measuring of filtration rate during water penetration through it. This new method makes possible to analyse effects acting to filterability of beer and effect of technologic precaution for improving of bad filterability.Experience...
Ensuring quality control during determination of PBC in beer, using statistic control of surrogate standard.Peer-reviewed article
T. HORÁK, J. ČULÍK, P. ČEJKA, V. KELLNER
Kvasny Prum. 2000; 46(2): 41-43 | DOI: 10.18832/kp2000004
In the framework of a good laboratory praxis the emphasis is placed to the quality of reproducible results. For this reason are very useful methods of mathematical statistics, which in the form of regulating diagrams, can help to the speed identification of that results, which are outside the required tolerances. There are a lot of various samples used for statistical regulation. One possibility how to control the efficiency of whole analytic process, from prepearing to the final determination, is using of surrogate standard. For PCB determination in various types of water were found as a surrogate standard following two compounds: 2,4,5,6-tetrachlor-m-xylen...