Suitable for Congress mash
The amount of soluble nitrogenous substances in Congress wort is determined using spectrophotometry at wavelengths of 215 and 225 nm.
Malt intended for use in beer brewing or elsewhere in the food industry
The determination of the color of the Congress wort is carried out by measuring the absorbance of the wort at 430 nm and then multiplying the value by a specified factor.
This method describes the spectrophotometric determination of the color of roasted malt beer/extract.
Roasted malt beer/extract intended for use in beer brewing or elsewhere in the food industry.
Determination of the colour of wort and beer by spectrophotometric measurement at 430 nm.
Suitable for all worts and beers.
Spectrophotometric determination of colour attempts to eliminate the subjective influences of the human eye and differences in colour impression when comparing beer samples with the EBC colour disc. This instrumental method is the official reference method and can be used for operational wort, beer and laboratory wort (congress wort).
The absorbance is measured in a 10 mm cuvette at a wavelength of exactly 430 nm. The colour in EBC units is obtained by conversion with a suitable factor.
Determination of bittering units in beer, beer-based beverages and wort.
This method is not suitable for beer, beer-based beverages or wort, which contain saccharin, p-hydroxybenzoic acid ester, salicylic acid or sorbic acid.
The bitter substances, primarily iso α-acids, are extracted using iso-octane from the acidified sample, and their concentration in the extract is determined spectrophotometrically [1].
This method describes how to determine the true color of water by means of spectrophotometry.
Water intended for use as an ingredient in the production of beer (brewing liquor) or other foods
The color of water is determined by measuring the absorbance at a minimum of three wavelengths at various points across the visual spectrum:
λ1 = 436 nm (obligatory), λ2 = 525 nm, λ3 = 620 nm (for λ2, λ3 minor deviations are permitted). If necessary, measurements at additional wavelengths must be carried out.