Suitable for Congress mash
The amount of soluble nitrogenous substances in Congress wort is determined using spectrophotometry at wavelengths of 215 and 225 nm.
Applicable for all (laboratory) worts
Medium and high molecular weight proteins are precipitated by phosphomolybdic acid. The nitrogen is determined in the filtrate. Therefore, the results express the amount of low molecular weight proteins.
A defined amount of formaldehyde is added to beer. Haze forms in the beer which is correlated with "warm days".
Valid for all non-turbid beers
The formation of haze is forced through the addition of formaldehyde and storage at 0 °C. The difference in the turbidity formed and the turbidity at the beginning is compared.
This method describes how to determine the hop oil content in hops and hop products.
Hops and hop products intended for use in beer brewing or elsewhere in the food industry
The aroma compounds in hops are driven out through steam distillation and are captured in a special apparatus. The determination is carried out through reading the volume transferred into the apparatus.
Suitable for Congress mash
Wort is produced according to the Congress mash method (fine grind), and then the nitrogen content of the wort is determined.
Malt intended for use in beer brewing or elsewhere in the food industry
After boiling for two hours on a reflux condenser, the wort is clarified using membrane filtration. The color is measured with a spectrophotometer.