Table 1.
Potentiometric response slopes of the H2TFcP-based membranes towards several analytes in individual solutions.
| Salt | Slope (mV/pX a) | |
|---|---|---|
|
| ||
| Mb1: H2TFcP 1wt% | Mb2: H2TFcP 1wt%, TpClPBK 0.25wt% | |
| NaCl | 1.0 ± 2.3 | 1.9 ± 1.3 |
| KCl | 1.1 ± 0.9 | 8.1 ± 5.5 |
| LiCl | −0.7 ± 0.15 | 0.9 ± 3.0 |
| NH4Cl | 0.8 ± 0.3 | 7.3 ± 4.6 |
| MgCl2 | 1.7 ± 0.3 | 1.8 ± 0.6 |
| Zn(NO3)2 | 5.2 ± 0.6 | 6.0 ± 1.7 |
| CdCl2 | 3.1 ± 0.6 | 3.0 ± 1.7 |
| CoCl2 | 4.34 ± 0.8 | 3.2 ± 1.6 |
| Pb(NO3)2 | 17.0 ± 5.1 | 23.4 ± 1.0 |
| Cu(NO3)2 | 15.1 ± 1.8 | 30.8 ± 2.5 |
| NaCl - TRIS | 1.3 ± 0.6 | 11.7 ± 2.7 |
| CdCl2 - TRIS | 5.3 ± 3.9 | 6.5 ± 1.8 |
| CoCl2 -TRIS | 1.7 ± 0.8 | 1.3 ± 0.3 |
| Pb(NO3)2 - TRIS | 31.5 ± 2.2 | 34.8 ± 2.0 |
| Cu(NO3)2 - TRIS | 35.2 ± 1.5 | 36.8 ± 4.9 |
|
| ||
| pH b | 39.7 ± 1.8 | 13.2 ± 2.1 |
a
the mean value for three replicated measurements;
b
from 5.5 to 10.2 pH units range.