The measurement of yeast assimilable nitrogen is used to determine the amount of two most prominent forms of nitrogen that serve as yeast nutrients. These components are Alpha Amino Nitrogen (N-OPA) and Ammonia (NH3); the YAN measurement Is the sum of N-OPA and NH3. Improper nitrogen levels can slow or stop fermentation, compromising the quality and organoleptic characteristics.
Yeast Assimilable Nitrogen (YAN)
(Units: mg/L, Technique: Enzymatic)