"Uptake rate standard error of nitrate {NO3- CAS 14797-55-8} per day per unit area of the water body [particulate >GF/F phase] by isotope-labelled tracer addition, incubation at different light levels, filtration and mass spectrometry on residue and profile integration"@en . . "SDN:P01::INSEIIP1" . "The standard error of the mean (defined as the standard deviation divided by the square root of the sample size) of multiple determinations of the specified phenomenon."@en . .