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 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.
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 the fluorimetric determination of high-molecular weight β-glucans in laboratory worts.
Suitable for all types of (laboratory) worts
The fluorochrome Calcofluor forms a complex with high molecular weight β-glucans (molecular weight greater than 5 kDa). Complex formation results in an increase in fluorescence; however, this fluorescence is extremely unstable due to photochemical degradation.
Reproducible measurements for fluorescence and determination of β-glucan are possible through measurement in an automatic analysis system based on flow injection (flow-injection analysis). The apparatus is calibrated using purified barley β-glucan standard solutions.
This method describes how to determine the β-glucan in laboratory wort by means of a fluorimetric method using microtiter plates (MTP).
Applicable for all (laboratory) worts
Determination of the proportional composition of grist fractions through sieve analysis
Malt grist, grist from adjuncts
The extract yield in the brewhouse is highly dependent on optimal milling of the malt or other grain. The composition of the brewery grist should therefore be monitored on a regular basis.
The sieve analysis is performed on a sample of brewery grist of a known weight with a shaking device containing a set of sieves (according to DIN ISO 3310-1 specifications or a Pfungstädter plansifter sieving device).