. . . . . . . . . . . . . . "The amount (mass or moles) of the specified chemical entity contained in aerosols within the specified size fraction isolated from a volume of atmosphere using the specified method."@en . . "accepted"@en . . . "soluble_Na_aerosol_NH4AC_Leaching_>1um" . . . "SDN:P01::AEC024CC" . "Concentration of soluble sodium {soluble_Na CAS 7440-23-5} per unit volume of the atmosphere [aerosol >1um phase] by filtration, leaching with pH 4.7 ammonium acetate buffer"@en . . . .