gas phase
tolualdehyde and C9-aromatics number concentration
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 chemical formula for tolualdehyde is C8H8O. Tolualdehyde and C9-aromatics are members of the isobaric groups.
Observed Property
Observation Matrix
number concentration
Object Of Interest
ACTRIS Vocabulary
trace gas variables
variable