Research Article
Dialysis Pretreatment for Dissolved Organic Nitrogen Analysis in Freshwaters
Table 1
The concentrations of TDN(0), NH3-N(0), NO3-N(0), DIN(0), and DON(0) in the raw water samples.
| | Sample # | [TDN](0) | [NH3-N](0) | [NO3-N](0) | [DIN](0) | [DON](0) | | mg L−1 | mg L−1 | mg L−1 | mg L−1 | mg L−1 |
| | Sample #1 (Site 1) | 3.56 | 0.05 | 1.15 | 1.20 | 2.36 | | Sample #2 (Site 1) | 1.81 | 0.30 | 0.46 | 0.76 | 1.05 | | Sample #3 (Site 2) | 2.90 | 0.35 | 1.10 | 1.45 | 1.45 | | Sample #4 (Site 2) | 1.37 | 0.25 | 0.15 | 0.40 | 0.96 | | Sample #5 (Site 5) | 1.27 | 0.24 | 0.25 | 0.49 | 0.78 | | Sample #6 (Site 7) | 1.93 | 0.32 | 0.95 | 1.27 | 0.66 | | Sample #7 (Site 9) | 600 | 590 | 5.58 | 596 | 4 | | Sample #8 (Site 9) | 405 | 400 | 8.71 | 409 | — | | Sample #9 (Site 9) | 633 | 640 | 8.64 | 649 | — | | Sample #10 (Site 10) | 314 | 250 | 13.3 | 263 | 51 | | Sample #11 (Site 10) | 218 | 210 | 3.44 | 213 | 5 | | Sample #12 (Site 10) | 372 | 340 | 5.22 | 345 | 27 | | Sample #13 (Site 11) | 41.2 | 30.0 | 8.79 | 38.8 | 2.4 | | Sample #14 (Site 12) | 9.02 | 3.80 | 1.12 | 4.92 | 4.10 | | Sample #15 (Site 13) | 4.99 | 2.21 | 0.27 | 2.48 | 2.51 |
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