| Elect. no. | Composition, mg | Conc. range (mol∙L−1) | Slope (mV∙decade−1) A-ionophore (electrode I) | Slope (mV∙decade−1) B-ionophore (electrode II) | Response time, s | ||
| Ionophore Content (mg) | Plasticizer (100 ml) | Graphite powder (mg) | |||||
| 1 | 2.5 | NPOE | 250 | 10−7 - 10−2 | 16 | 23.7 | <15 |
| 2 | 5 | NPOE | 250 | 10−7 - 10−2 | 18 | 24.8 | <15 |
| 3 | 7.5 | NPOE | 250 | 10−7 - 10−2 | 26.5 | 25.6 | <15 |
| 4 | 10 | NPOE | 250 | 10−7 - 10−2 | 30.2 | 29.1 | <15 |
| 5 | 12.5 | NPOE | 250 | 10−7 - 10−2 | 20.5 | 24 | <15 |
| 6 | 10 | DOP | 250 | 10−7 - 10−2 | 22.3 | 27.5 | <15 |
| 7 | 10 | DOS | 250 | 10−7 - 10−2 | 27 | 23 | <15 |
| 8 | 10 | TCP | 250 | 10−7 - 10−2 | 25.2 | 23 | <15 |