. "SDN:P01::AMONAAD2" . . . . "accepted"@en . . "Concentration of ammonium {NH4+ CAS 14798-03-9} per unit volume of the water body [dissolved plus reactive particulate <0.4/0.45um phase] by filtration and colorimetric autoanalysis"@en . "Colorometric autoanalysis (0.45 um pore filtered)"@en . . . "NH4_0.4umFilt_ColAA" . . . . . . . . . . . . . . . . . . . . . . . . .