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| sample | added (μM) | found (μM) | recovery (%) | RSD (%) |
|---|---|---|---|---|
| lake water | 0.5 | 0.47 | 94.80 | 1.23 |
| 1.5 | 1.51 | 100.6 | 1.32 | |
| 2.5 | 2.48 | 99.20 | 1.06 | |
| 5 | 4.94 | 98.80 | 0.30 | |
| tap water | 0.5 | 0.46 | 92.0 | 1.24 |
| 1.5 | 1.48 | 98.6 | 0.67 | |
| 2.5 | 2.51 | 100.4 | 1.79 | |
| 5 | 4.93 | 98.6 | 0.42 |
