Table 3. Stern–Volmer (KSV) Constants and Binding Constants (KS) of Azo-Py with Various Metal Cations.
| metal cation | KSV (M–1) | KS (M–1) |
|---|---|---|
| Al3+ | 152 | 376 |
| Hg2+ | 143 | 183 |
| Pb2+ | 31.9 | 120 |
| Tl+ | 19.1 | 112 |
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