. . "total_Rb_aerosol" . "Concentration of rubidium {Rb CAS 7440-17-7} per unit volume of the atmosphere [aerosol phase]"@en . . . . . . "A generic code for the quantity or mass of the specified substance in the aerosols normalised to one unit volume of atmosphere."@en . "SDN:P01::CRU88031" . "accepted"@en . . . . . . . . . . . . .