Number concentration means number of molecule per unit volume, and is used in the construction molecular_concentration_of_X_in_Y, where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as 'nitrogen' or a phrase such as 'nox_expressed_as_nitrogen'. The chmical formula for perylene is C20H12. It is a member of the group of polycyclic aromatic hydrocarbons (PAHs). The IUPAC name is perylene
trace gas variables
variable
gas phase
number concentration
ACTRIS Vocabulary
gaseous perylene number concentration
perylene number concentration
perylene
Observed Property
Observation Matrix
Object Of Interest