Table 5.
Comparison of the prepared sensor to the other Ba2+–selective potentiometric sensors previously reported
| Ionophore | Linear range, M | Limit of detection, M | Slope, mV dec−1 | pH working range | Response time, s | References |
|---|---|---|---|---|---|---|
| Thiosemicarbazone derivative molecule | 1.0 × 10−6–1.0 × 10−1 | 5.54 × 10–7 | 28.9 ± 1.43 | 6.0–9.0 | < 10 | [30] |
| Dimethyl-4,4-dimethoxy-5,6,5,6-dimethylene dioxy biphenyl-2,2-dicarboxylate | 1.0 × 10–5–1.0 × 10–1 | 5.0 × 10–6 | Not reported | 4.0–9.0 | Not reported | [31] |
| 2,3,4-pyridine-1,3,5,7,12-pentaazacyclopentadeca-3-ene | 1.41 × 10−6–1.0 × 10−1 | Not reported | 30.0 | 2.5–7.0 | 18 | [32] |
| 4–4’-methylenediantipyrine | 1.0 × 10–6–1.0 × 10–2 | 5.2 × 10–7 | 29.7 ± 0.3 | 3.4–10.6 | 15 | [33] |
| Barium(II)–Rose Bengal | 5.0 × 10–5–1.0 × 10–1 | 2.5 × 10–6 | 28.5 ± 0.4 | 4.5–10.0 | 20 | [34] |
| 3-deoxy-D-erythro-hexos-2-ulose bis (thiosemicarbazone) | 1.0 × 10–6–1.0 × 10–2 | 5.6 × 10–7 | 29.6 ± 0.5 | 2.6–11.0 | 15 | [35] |
| 4-aminobenzoic acid 2-diethylaminoethyl ester | 1.0 × 10–5–1.0 × 10–1 | 4.23 × 10–6 | Not reported | 5.0–11.0 | 8 | [36] |
| Dibenzo-24-crown-8 | 1.0 × 10–6–1.0 × 10–3 | 6.1 × 10–7 | 30.1 | 4.1–9.0 | < 10 | [37] |
| 1,2-bis(diarylphosphine oxide) naphthalene | 1.0 × 10–5–1.0 × 10–1 | 5.0 × 10–6 | 30.0 | 3.0–11.0 | 60 | [38] |
| macrocyclic tetrabasic ligand | 3.6 × 10–6–1.0 × 10–1 | 1.9 × 10–6 | 29.7 ± 0.2 | 2.5–7.5 | 10 | [39] |
| (E)-2-((4-oxo-2-thioxothiazolidin-5-ylidene)methyl)phenyl 4-methoxybenzoate (3) | 1.0 × 10–6–1.0 × 10–1 | 7.66 × 10–7 | 25.0 ± 2.5 | 5.0–8.0 | 6 | This work |
| (E)-2-((4-oxo-2-thioxothiazolidin-5-ylidene)methyl)phenyl 2,4-dichlorobenzoate (4) | 1.0 × 10–7–1.0 × 10–1 | 9.77 × 10–8 | 27.0 ± 2.3 | 5.0–9.0 | 5 | This work |