. . . . . . . . . "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::AMONASSD" . "Uptake rate standard deviation of ammonium {NH4+ CAS 14798-03-9} {regenerated production standard deviation} per hour per unit volume of the water body [particulate >GF/F phase] by isotope-labelled tracer addition, in-situ incubation, filtration and mass spectrometry on residue"@en . . . "accepted"@en . . "NH4_assimilation_SD_GF/FFilt" . . . . . . . . . . . . . . . . .