Barley malt intended for use in beer brewing or elsewhere in the food industry
High-molecular weight dextrins and starch present in the wort extracted from brewery spent grains are precipitated through the addition of ethanol, centrifuged and dissolved in phosphate buffer, followed by the addition of an iodine solution. Depending upon the molecular weight and degree of branching, a red to blue color forms, the intensity of which is measured spectrophotometrically at 578 nm.
The method describes the isothermal production of wort at 65 °C.
Malt intended for use in beer brewing or elsewhere in the food industry
The isothermal mashing process is the principle method for producing laboratory malt extract. The resultant wort is then analyzed for a wide variety of attributes. This mashing regime is often selected as the extraction process for the purposes of more discernably comparing the differences in barley varieties .
This method describes how to collect samples of malt.
Malt intended for use in beer brewing or elsewhere in the food industry.
Collection of representative samples
During sensory evaluation, the cones are rubbed between the hands and the quality of the aroma is distinguished in terms of purity, fineness and intensity.
Whole hops intended for use in beer brewing or elsewhere in the food industry
Evaluation of the aroma of hop cones is performed through visual and manual inspection.
Points to be awarded: 1−30
The compounds in the malt dissolved in the mash liquor during a standardized mashing process using finely ground malt (fine grist) are determined in this analysis.
Malt intended for use in beer brewing or elsewhere in the food industry
The Congress mash method primarily serves to determine the extract content of malt.
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.
Furthermore, the following is tested over the course of this analysis: Iodine test (saccharification time), odor of the mash, wort run-off, clarity of the filtered wort; the Congress wort is also used as a basis for a wide variety of further analyses.
Whole leaf hops which are intended for use in the brewing and food production industries
Whole leaf hops are typically evaluated before being processed further by hop product manufacturers or prior to use in a brewery. It is recommended that an evaluation sheet be used for manual evaluation of hops such as the "Evaluation Form" from the Gesellschaft für Hopfenforschung e.V.