Table 7. Determination of NA in spiked environmental water samples (n = 3).
| Sample | Added (µM) | Found (µM) | Recovery (%) | RSD (%) |
|---|---|---|---|---|
| Tap water | 2 | 1.93 | 96.5 | 3.1 |
| Tap water | 5 | 5.16 | 103.1 | 2.8 |
| River water | 2 | 2.02 | 101 | 3.2 |
| River water | 5 | 4.88 | 97.6 | 2.5 |
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