Research Article
A Novel Analytical Method for Trace Ammonium in Freshwater and Seawater Using 4-Methoxyphthalaldehyde as Fluorescent Reagent
Table 2
The data of the calibration curves of the proposed method and the OPA method.
| The proposed method | The OPA method | , mol/L | FI signals | , mol/L | FI signals |
| 0 | 106.558 | 0 | 19.495 | 0.025 | 122.59 | 0.2 | 40.082 | 0.05 | 155.229 | 0.4 | 67.216 | 0.1 | 207.895 | 0.8 | 114.717 | 0.2 | 262.620 | 1.2 | 172.028 | 0.3 | 362.817 | | |
| The regression equation | (, ) | The regression equation | (, ) |
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