. . . . . . . . . . . . . . . . . "The square root of the average of the squares of deviations about the mean of a set of values of the specified measurement."@en . . . . . "accepted"@en . "SDN:P01::AEC055SD" . . "soluble_Ni_aerosol_H2O_Leaching_>1um_SD" . "Concentration standard deviation of soluble nickel {soluble_Ni CAS 7440-02-0} per unit volume of the atmosphere [aerosol >1um phase] by filtration, water leaching"@en . . . .