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Application of the optochemical sensing device for determining the Zn2+ and Pb2+ contents of untreated river water.
| Untreated River Water | |
|---|---|
| 1 | 50 ppb Zn2+ + 10 ppb Pb2+ |
| 2 | 0.22 |
| 0.24 | |
| 3 | 260 ± 63 ppb |
1 The real concentration of Zn2+ and Pb2+ measured via ICP-OES. 2 The theoretically expected cumulative absorbance for Zn2+ and Pb2+ at 243 nm based on its concentration measured via ICP-OES. 3 The concentration of Zn2+ was calculated according to the reported calibration curve (Section 3.3).
