Table 2. NO3– Detection in Different Water Samples.
| sample | added (mM) | detected by sensor (mM) | RR (%) | detected by HPLC (mM) |
|---|---|---|---|---|
| tap water | 0.8 | 0.838 ± 0.045 | 102.3 | 0.858 ± 0.040 |
| river water | 0.8 | 0.840 ± 0.038 | 107.5 | 0.903 ± 0.028 |
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