Table 2.
Measurement of free-Cl concentration in the samples of swimming pool water using the CuO-ZIF-8/GC sensor.
| Sample | Added (ppm) | Found (ppm) | Recovery (%) | RSD (%) (n = 3) |
|---|---|---|---|---|
| Swimming pool-1 | 12.3 | 12.7 | 103.2 | 4.2 |
| Swimming pool-2 | 8.1 | 7.9 | 97.5 | 2.8 |
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