| Title |
Simultaneous Determination of Total Nitrogen and Total Phosphorus by Alkaline Persulfate Oxidation in Seawater and Freshwater |
| Authors |
정진아 ( Jeong Jin A ) ; 박청길 ( Park Cheong Gil ) ; 김동명 ( Kim Dong Myeong ) |
| Keywords |
total nitrogen; total phosphorous; alkaline persulfate method |
| Abstract |
It is necessary to develop a standard method for determination of total nitrogen (T-N) and total phosphorous (T-P) in seawater because the T-N and the T-P have been adopted in marine water quality standards since 2001. Precision and recovery of the simultaneous determination of T-N and T-P by alkaline persulfate oxidation in seawater and freshwater were assessed. Relative standard deviation and recovery of eleven seawater and freshwater standards of known nitrogen concentration were ±1.59∼±6.45% and 93.0∼100.6%, respectively. Relative standard deviation and recovery of eleven seawater and freshwater standards of known phosphorus concentration were ±0.62∼±4.95% and 96.0-1 00.8%, respectively. Relative standard deviation of five samples of seawater collected from Nakdong estuary and five samples of freshwater collected from Nakdong river were ±3.14∼±5.52% for nitrogen and ±3.98∼±6.67% for phosphorus. We can find that this method has a good precision and recovery below the acceptance limits for total nitrogen and total phosphorus in analyzing seawater and freshwater samples. |