Applicable for all (laboratory) worts
The Congress wort is heated in order to inactivate the amylolytic enzymes, and afterwards, yeast is added and the wort is allowed to completely ferment out at a minimum temperature of 20 °C in a fermentation tube (fig. 1). The difference in the extract before and after fermentation is measured in order to calculate the limit of attenuation.
This method describes how to carry out the profile test.
beer, beer-based beverages, non-alcoholic beverages, mineral water
This method is employed for determining the appropriate level of intensity for certain product attributes.
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.
Green beer, beer
The original gravity (p), apparent extract (EA) and real extract (ER) of the green beer and the fully matured beer are measured. From this, the apparent and real attenuation are calculated. Normally, only the apparent attenuation of beer is determined in practice.
This method describes how to carry out the profile test.
beer, beer-based beverages, non-alcoholic beverages, mineral water
The sensory properties of a product can be identified and quantified by a tasting panel trained in descriptive testing using the profile method. The product profile is impartial and is used for product development as well as for monitoring changes in the product over time.
Hops and hop products intended for use in beer brewing or elsewhere in the food industry
The volatile constituents in hops or hop products are obtained by means of steam distillation. The hydrocarbon and oxygen fractions are separated using a process involving column chromatography.