gas phase
ammonium
Observed Property
Observation Matrix
number concentration
Object Of Interest
Amount fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. The chemical formula for ammonium is NH4+. Ammonium is a member of the group of inorganics. The IUPAC name for ammonium is azanium.
ammonium amount fraction
ACTRIS Vocabulary
trace gas variables
variable