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Results of the determination of nitrate and ammonium ions in catfish water sample (n=2).
| Water samples | Predicted (ppm) | Measured (ppm) | Relative error (%) | |
|---|---|---|---|---|
| a) Nitrate ion | ||||
|
|
||||
| 1 | 3.98 | 4.15 | -4.10 | |
| 2 | 10.20 | 10.36 | -1.54 | |
| 3 | 3.26 | 3.12 | 4.49 | |
| 4 | 8.85 | 8.74 | 1.26 | |
| 5 | 13.52 | 13.20 | 2.42 | |
| b) Ammonium ion | ||||
|
|
||||
| 1 | 1.17 | 1.21 | -3.31 | |
| 2 | 1.40 | 1.44 | -2.78 | |
| 3 | 2.86 | 2.89 | -1.04 | |
| 4 | 0.80 | 0.79 | 1.27 | |
| 5 | 0.60 | 0.58 | 3.45 |
