"2023-03-31 17:28:15.0" . . . "4" . "SD_SO4_aerosol_<1um" . . . "SDN:P01::ASDSUA01" . . "The square root of the average of the squares of deviations about the mean of a set of values of the specified measurement."@en . "SDN:P01::ASDSUA01" . . "false" . "SDN:P01::ASDSUA01" . "2023-03-31 17:28:15.0" . . . "accepted"@en . . . "Concentration standard deviation of sulfate {SO4(2-) sulphate CAS 14808-79-8} per unit volume of the atmosphere [aerosol <1um phase] by filtration and ion chromatography"@en . "4" . . . . . . .