. . . . . . . . . . "Unavailable"@en . . . . . . "conc_C2O4_aerosol_>1um" . . "SDN:P01::ACOXAE02" . "accepted"@en . . "Concentration of oxalate {C2O4} per unit volume of the atmosphere [aerosol >1um phase] by filtration and ion chromatography"@en . . . . . . . . .