| Test series | Used medium | pH | Chloride concentration (mM) | Purpose of OCP measurement in this environment (criteria for sensors’ performance) |
| 1 | Simulated pore solution (SPS) | 13.6 | 0 | Stability: OCP variation in chloride-free alkaline solution (Figure 2) | 2 | Cement extract solution (CE) | 12.8 | 20, 260 | Reproducibility: dependent on different properties of the AgCl layer (Figure 4) | 3 | Simulated pore solution (SPS) | 7, 9, 12.8, 13.6 | 1, 2, 4, 16, 62, 250 | Reliability: interference of hydroxide ions and chloride detection limits (Figure 6) | 4 | Cement extract solution (CE) | 12.8 | 12, 14, 16, 20, 27, 44, 77, 142, 260, 513, 1008 | Reversibility: response to continuous addition of chloride (Figures 7 and 8) | 5 | Simulated pore solution (SPS) | 13.6 | 0, 125, 1000 |
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