The method is suitable for the determination of water vapor volatile aroma compounds in beer.
Volatile aroma compounds are driven out of the sample through steam distillation. The ethanolic distillate is saturated with NaCl. Potassium hydrogen sulfite is added to separate carbonyl groups that might interfere with the analysis. The extraction of the aroma compounds is performed by shaking out with dichloromethane and the phases separated by centrifuging.
This method describes the rapid method for determining the germinative capacity of an individual lot of barley.
Barley intended for the production of malt is evaluated on the basis of its germinative capacity.
In living kernels, in the presence of oxidoreductases and their corresponding coenzymes, the colorless compound triphenyltetrazolium chloride is reduced to formazan, which is red in color [1].
Barley intended for the production of malt; therefore, the barley must be evaluated on the basis of its germinative capacity.
Under the influence of oxygen, which is liberated through the degradation of hydrogen peroxide, the barley kernels emerge from dormancy. In this way, germination can be induced at any given time.