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.
This method describes how to evaluate the odor of the Congress mash.
Malt intended for use in beer brewing or elsewhere in the food industry
The odor of the mash is evaluated with the help of the human olfactory apparatus.
The method describes the analysis for optically evaluating the (Congress) mash.
Malt intended for use in beer brewing or elsewhere in the food industry
Optical evaluation of the appearance of (Congress) wort
Malt intended for use in beer brewing or elsewhere in the food industry
The value of pH is defined as the negative decadal logarithm of the concentration of hydrogen, or more precisely, hydronium ions:
\(\text{ pH }=-\log{ c_{ H_{ 3 }O^{ + } } }\)
The pH scale, ranging from 0–14, is based on the dissociation equilibrium.
The pH value of a liquid is commonly determined with a pH measurement device consisting of the measurement electrode (glass) and the reference electrode (e.g., silver/silver chloride electrode), which is connected to a signal amplifier and a display instrument. The device is calibrated using standard buffer solutions.
The pH reading displayed is determined through the difference in electrical potential between the reference solution in the electrode and the solution being measured.
Generally, a pH measurement system is used, in which the measurement and reference electrodes are combined to form a single unit.
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.
Applicable for all (laboratory) worts
The Congress wort is heated in order to inactivate the amylolytic enzymes. Afterwards, 16 g/100 ml yeast is added, and the wort is allowed to completely ferment out in approx. 7 h.