| Serial no. | Mn(vii) : Mn(ii) | Mn, taken (μg L−1) | Mn, found (μg L−1) | Error (μg L−1) | |||
|---|---|---|---|---|---|---|---|
| Mn(vii) | Mn(ii) | Mn(vii) | Mn(ii) | Mn(vii) | Mn(ii) | ||
| 1 | 1 : 5 | 10 | 50 | 9.98 | 49.80 | 0.02 | 0.20 |
| 1 | 1 : 5 | 10 | 50 | 9.99 | 49.70 | 0.01 | 0.30 |
| 1 | 1 : 5 | 10 | 50 | 9.98 | 49.80 | 0.02 | 0.20 |
| Mean error: Mn(vii) = ±0.017; Mn(ii) = ±0.234 | |||||||
| Standard deviation: Mn(vii) = ±0.0015; Mn(ii) = ±0.0018 | |||||||
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