"2023-03-31 17:28:15.0" . . "The square root of the average of the squares of deviations about the mean of a set of values of the specified measurement."@en . . . . . "4" . . "SDN:P01::ASDMSA01" . "Concentration standard deviation of methane sulfonic acid {CH3SO3H CAS 75-75-2} per unit volume of the atmosphere [aerosol <1um phase] by filtration and ion chromatography"@en . . "SDN:P01::ASDMSA01" . . . "SD_CH3SO3H_aerosol_<1um" . . "4" . . "SDN:P01::ASDMSA01" . "accepted"@en . . . . . "2023-03-31 17:28:15.0" . "false" .