. . . . "Activity standard deviation of lead-210 {210Pb CAS 14255-04-0} per unit volume of the water body [dissolved plus reactive particulate <0.4/0.45um phase] by filtration, acidification and alpha spectroscopy"@en . "accepted"@en . . "DissPb210_SD_water<0.4/0.45um" . . . . "SDN:P01::ALE77004" . "The square root of the average of the squares of deviations about the mean of a set of values of the specified measurement."@en . . . . . . . . . . . . . . . . . . . . .