"1" . "Measurements made by tracer doped incubation in full natural sunlight followed by mass spectrometric analysis of particulates collected on a GF/F filter filtering water previously filtered through a 5um pore filter. Rates normalised by dividing total uptake by the incubation duration in hours." . "SNAURSPM" . . "SNAURSPM" . "accepted" . "SNAURSPM" . "1" . "03-NOV-09" . . "NNH4Upt_nat_GFF-5um" . "Uptake rate (hourly) of ammonium per unit time per unit volume of the water body [particulate GF/F-5um phase] by tracer doping, on-deck incubation at full natural light level, cascade filtration and mass spectrometry on residue"@en . . .