Table 2.
The comparison of the performance of the new MWCNT-OSO3−TBZ+ sensor with the performance of other potentiometric sensors for TBZ determination.
| Type of the Electrode | ISE with Liquid Membrane and Inner Electrolyte | ISE with Liquid Membrane and Inner Electrolyte | Solid-State ISE with Liquid Membrane |
|---|---|---|---|
| Ionophore | (TBZ)3(PMo12O40)2 1 | (TBZH2)3(PMo12O40)2 2 | MWCNT-OSO3−TBZ+ |
| Slope [mV/decade of activity] | 30 | 30 | 60.4 ± 0.8 |
| Detection limit [M] | 1.00 × 10−5 | - | 6.2 × 10−7 |
| Useful conc. range [M] | 1.0 × 10−5–1.0 × 10−2 | 1.0 × 10−5–1.0 × 10−2 | 8.6 × 10−7–1.0 × 10−3 |
| Dynamic response [s] | 40–50 (c = 10−3–10−2 M); 120–180 (c = 10−6–10−4 M) |
40–50 (c = 10−3–10−2 M); 120–180 (low concentration) |
8 (c = 5.0 × 10−7–1.0 × 10−4) |
| Working pH range | 4–5 | 3–4 | 2–4 |
| Lifetime [days] | 65 | 60–65 | 90 |
| Ref. | [22] | [34] | This work |
1 Ion pair of TBZ with 12-molybdophosphoric acid. 2 Ion pair of TBZH22+ with 12-molybdophosphoric acid.