The simultaneous determination of total nitrogen (TN) and total phosphorus (TP) in seawater by micro-autoana- lyzer after persulphate oxidation was made. The relative error is less than 3. 8 % when TN is higher than 1...The simultaneous determination of total nitrogen (TN) and total phosphorus (TP) in seawater by micro-autoana- lyzer after persulphate oxidation was made. The relative error is less than 3. 8 % when TN is higher than 17. 7μmol/L and less than 5. 8 % when TP is higher than 0. 38 μmol/L. The recovery percentage of TN and TP are 96 %-123 % and 94 %-113 %. During iced conservation after persulphate oxidation, the concentrations of TN and TP did not change with time.展开更多
文摘The simultaneous determination of total nitrogen (TN) and total phosphorus (TP) in seawater by micro-autoana- lyzer after persulphate oxidation was made. The relative error is less than 3. 8 % when TN is higher than 17. 7μmol/L and less than 5. 8 % when TP is higher than 0. 38 μmol/L. The recovery percentage of TN and TP are 96 %-123 % and 94 %-113 %. During iced conservation after persulphate oxidation, the concentrations of TN and TP did not change with time.
