gas phase
ACTRIS Vocabulary
variable
trace gas variables
PCB 135
PCB 144
gaseous PCB 144 and PCB 135 number concentration
PCB 144 and PCB 135 number concentration
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'. PCB 144 and PCB 135 is a mixture of two compunds and belongs to the group of persistent organic pollutants known as polychlorinated biphenyls (PCBs).
Observed Property
Observation Matrix
Object Of Interest