The method describes how to determine the boron content of water photometrically with a cuvette test.
Water intended for use as an ingredient in the production of beer (brewing liquor) or other foods
Borate ions react with azomethine-H, forming a yellow substance which can be measured photometrically. This method is suitable for analyzing samples collected from surface water and wastewater. Comparison with a sample-specific blank compensates for any minor coloration in water samples that may influence the analysis. Turbidity, which may interfere with the photometric determination, can be eliminated by pouring the water sample through a membrane filter.
Determination of the overall brewhouse yield during wort production in order to monitor brewhouse operations
Wort from the midpoint of chilling/pitching wort
Since determination of the hot wort yield can be problematic and the cold wort yield as described above does not represent a measure of the total extract obtained from the grain bill, an attempt has been made to record all of the extract recovered, with the exception of that remaining in the spent grain. This value is then compared to the laboratory yield. The result is expressed as the total yield (overall brewhouse yield) (OBYCW) in %.
This method describes how to mill grain or malt to produce fine or coarse grist.
Malt intended for use in beer brewing or elsewhere in the food industry
Malt is ground between two horizontally positioned, grooved discs. The lower disc is driven by an electric motor and rotates at approx. 1500 rpm; the upper disc is fixed and therefore does not move. During the milling process, the malt migrates from the center of the discs to the outer edge, where the grist falls through an outlet spout into a grist beaker.
The gap between the discs can be adjusted by turning a socket head screw on a calibrated ring bearing scale markings. The scale on the calibrated ring ranges from 0 to 20, with each scale division corresponding to a gap between the discs of 0.10 mm. Each scale division is subdivided into five smaller divisions; each of the smaller marks is equivalent to 0.02 mm. Two gap adjusting rings ensure reproducible mill settings.
This method describes how to determine the extract content of malt used to produce laboratory wort.
Malt intended for use in beer brewing or elsewhere in the food industry
The extract content of malt refers to the compounds from finely ground malt (fine grind), which are brought into solution during a standardized mashing process.
The extract content is determined by the weight ratio sL 20/20 of the wort on the basis of the official sugar tables (Plato tables) at 20 °C. sL 20/20 stands for the weight ratio of a volume of wort at 20 °C to the same volume of water at the same temperature.
This method describes how to evaluate the odor of the Congress mash.
Malt intended for use in beer brewing or elsewhere in the food industry
The odor of the mash is evaluated with the help of the human olfactory apparatus.
This method describes how to determine the time required for filtration of laboratory mashes.
Malt intended for use in beer brewing or elsewhere in the food industry
The time from the beginning to the end of filtration is determined when producing a laboratory mash.