Table 5. Comparison of Previously Reported Phenobarbital Potentiometric Electrodes.
| sensory material | electrode type | slope (mV/decade) | detection limit (M) | linear range (M) | pH range (pH) | time response (s) | ref. |
|---|---|---|---|---|---|---|---|
| β-cyclodextrin | liquid polymeric electrode | –59.1 | 3.5 × 10–6 | 5.0 × 10–6 to 1.0 × 10–2 | 9–11 | 25 | (38) |
| γ-cyclodextrin | liquid polymeric electrode | –62.0 | 7.0 × 10–6 | 8.0 × 10–6 to 1.0 × 10–2 | 9–11 | 25 | |
| tetraoctylammonium/phenobarbaturate | solid contact | –59.0 | not reported | 2.0 × 10–4 to 1.0 × 10–1 | 9–11.5 | 15 | (39) |
| Ionophore I | Paper-based | –64.0 ± 1.1 | 2.0 × 10–6 | 4.0 × 10–6-1.0 × 10–3 | 7.5–10.5 | <5 | This work |
| Ionophore II | –63.6 ± 1.3 | 5.0 × 10–7 | 1.0 × 10–6-1.0 × 10–3 | ||||
| Ionophore I | GC-Solid Contact | –61.9 ± 0.9 | 5.3 × 10–8 | 1.0 × 10–7-1.0 × 10–3 | |||
| Ionophore II | –56.6 ± 0.3 | 3.1 × 10–8 | 6.0 × 10–8-1.0 × 10–3 |